H&K MP5SD: The Cadillac of Suppressed Submachine Guns

[@R1NR4N]

“I am not a suppressor expert.... yet.” This is why we love you Ian.

[@MostlyPennyCat]

I'm really hoping this time we'll have someone that will learn how to use fixed gain audio recording for demonstrations of suppressed weapons. Regular sounds boxes people use for KZbin have AGC on so it'll crank the gain for quiet things. What you want to do is turn the AGC off, do sound tests for the peak of your recording (regular gunfire) and then leave it. It'll probably have to be a multi mic setup though, a wooly bear for the weapon and a mic pack for each person doing talking. I have hope for Ian.

[@c1ph3rpunk]

Such humility. ;-)

[@rollastudent]

Time for a silencerco crossover?

[@MostlyPennyCat]

@@c1ph3rpunk Aaaaaw, shucks... ☺️ Seriously though, it's one of those pet hates. I'm not a talented audio engineer but it's one of the things I studied at, I guess an American would call it high school? But trying to demonstrate relative sound intensity with the AGC switched on? It's like trying to explain colour theory on black and white TV.

[@MostlyPennyCat]

@Jerrol Hale It's funny, I'm British and I live in the UK so most people will think I couldn't because 'guns are illegal in the UK' But, just like any country they're actually just licensed. One type of weapon I'm a very much allowed to own is a suppressed bolt action rifle. And I live next door to Accuracy International. So there is that.

[@stelbent]

In Sweden were I live I once worked at a mechanical shop and was assigned to work with an older, German gentleman that would come and help me with a xyz-axis flight simulator I was building. The German told me he was a retired chief of design and engineering at H&K "in the golden years". I told him I was interested in guns and stoked that Swedish laws had been allowing suppressors for hunters since that year. So he said "ah, zen you must znow about ze mpfumf SD, ja?" "Yeah, of course!" "I designed that suppressor." He really had great stories about all the great hero guns of h&k. The most skilled engineer I've ever worked with. I hope he is still alive.

[@AshleyPomeroy]

I'm going to call it the emm-pee fünf from now on.

[@stelbent]

@@AshleyPomeroy thanks for reminding me of this guy Ashley. Mr. Wolfgang Schnitzler if I'm not mistaken.

[@LordTrashcanRulez]

There are two things I'll always believe regardless of how insane it sounds 1. Anything negative about the government 2. Anything related to weapon designers

[@james64ibm]

The MP5 is so aesthetically pleasing, it really makes any other SMG look either cheap or like a toy by comparison.

[@Markus-zb5zd]

The MP5 is quite expensive that other MPs are actually cheap, compared to it.

[@HrHaakon]

@@Markus-zb5zd Yeah, but you can afford it.

[@sawyerhill1955]

@@Markus-zb5zd I 4

[@sawyerhill1955]

@@Markus-zb5zd .

[@ENCHANTMEN_]

The tubular front grip seems kinda weird looking to me, like they made it from a vacuum cleaner hose or something. Obviously it's not, and being cylindrical serves a purpose to fit around the suppressor. It just gives "homemade nerf gun" vibes I guess 😂

[@djomni115]

"Remember folks, efficiency is just clever laziness"

[@christianweibrecht6555]

Better to work smarter than to work harder

[@guilhermeartuzo7630]

Echo liked this comment

[@lukum55]

"Im going to lie down for a bit, Yokai can take care of them"

[@callidusvulpes5556]

This is true. I have a love-hate relationship with R6S.

[@trooperdgb9722]

That is so true. I was praised for efficiency once... I pointed out I was lazy, but had a conscience.

[@happyveliz]

Am I the only one imagining Ian at the museum sneakily snapping a picture of the suppressor design, and some guy that works at HK yelling, "Hey!" as Ian scurries out of there?

[@MoveAhead101]

He took it at the Mauser-Museum, not at HK

[@happyveliz]

@@MoveAhead101 yeah, so what? Its MY imagination......

[@MoveAhead101]

@@happyveliz you know, we germans have no humor. So better be correct in YOUR imagination

[@reinbeers5322]

@@MoveAhead101 German humor is no laughing matter.

[@ZERO-F2G-]

Yes....but it would have been...HEY...gun Jesus; could I get you autograph, I am a huge fan.

[@WingMaster562]

Can't wait for the HD version, Standard Def can only go for so much.

[@highlandoutsider]

🤣🤣🤣🤣👌

[@bwilliamstown]

The HD comes with a loudener instead of a suppressor

[@JoshuaC923]

MP4K coming up

[@GunsNGames1]

Yeah I hate to get shot at in SD resolution, give us the MP5HD so I can get shot in 1080p

[@AJBAXTER7677]

@@JoshuaC923 Nah bro they've even got MP58K now Hopefully I can get a good MP58K OLED

[@ItalianAvalanche]

"I recognize that hand guard from the Pancor Jackhammer!" - absolutely nobody lmao

[@easyadventurer]

To be fair, this IS forgotten weapons, not many people have heard of this “MP5” thing before. The Pancor really could share some of its glory with this unknown weapon. Hope it does well.

[@destructionfad7928]

Except Ian himself of course

[@eduardoandres5989]

it'd be the other way around for me, that's for sure

[@happyveliz]

It's funny that Ian actually mentions that in this video, when talking about the hand guard.

[@tarnvedra9952]

Somewhere in the distance, Zach cried out in terror.

[@worldview2888]

Till this day, THIS MP5 is still reliable and battle worthy.

[@dagerblood2174]

Agree

[@flyinginvietnam715]

Yes it is especially The airsoft variant

[@arch1757]

@@flyinginvietnam715 🤦🏽‍♂️

[@fluentinshittalk916]

I use it in call of duty everyday.

[@WhitechocolateHOTHOT]

@@flyinginvietnam715 You on the wrong channel mate

[@richardyoung1398]

“I’m not a suppressor expert…. Yet” This video was uploaded 7 months ago. Ian is now the worlds leading expert on suppressors, history and application. I’d bet my money on it. Ian, love ya buddy. We love what your doing!

[@AshleyPomeroy]

There'll soon be a Kickstarter campaign for his new book, "CHUT! Suppressors of the French Foreign Legion (in China)"

[@LilMalygos]

"This gun lacks an underbarrel grenade launcher!" - Valve, 1998

[@DoitForTheLolz1]

The MP7 in HL2: "hey kid, wanna see a magic trick?"

[@judsongaiden9878]

That wasn't the SD version. It has a barrel jacket so the M-203 fits better. It's not a suppressor.

[@ells101]

Don't forget about the 50 round magazines!

[@whiteboyduke5446]

Watch End Of Days. Arnold used it to blow up the devil with it.

[@johnsven878]

@keith moore I guess you can slap some if gun has picatinni rails inder the barrel.

[@maxkronader5225]

I have fired one of these. They are almost like magic. You can fire one at full auto like a video game. There is practically no muzzle climb.

[@staceyjordan4502]

I can confirm this.

[@shawnr771]

So can I.

[@justiron2999]

Lucky

[@acme420]

can confirm. is really point and shoot.

[@Meme-o-Taur]

Me too, can confirm

[@adamlangenbahn8531]

I got to shoot one of these a few years back at Battlefield Vegas. Ran two mags through it. It is very quiet, very easy to handle and very accurate. To say I had a smile on my face was an understatement. It is on my wish list of unobtanium weapons for me due to cost. But at least I got to fire one and full auto to boot.

[@sherlockbatmanholmes892]

I also shot the mp5sd at battlefield Vegas and hope to be able to afford one one day. It was the first full auto firearm I ever shot and it is my favorite.

[@themadscientest]

My bucketlist of things to do includes "shoot a machine gun" and this sounds like the exact gun I'd want to shoot! Would take those targets and frame them after!

[@moosemaimer]

Believe this was the second SMG I ever fired, and considering #1 was a Thompson it was a revelation.

[@Ideo7Z]

Shot that at Battlefield Vegas as well in 2018. Also shot an MP7. This is gonna be blasphemous but I preferred the MP7.

[@nickhannaford3253]

My 11 year old got to shoot this at Battlefield Vegas as well. Not in full auto though. Supposed to be very easy to handle. He also has a t-shirt target with a great group he shot with a UMP .45 👍

[@1ytcommenter]

"It is a little more complicated then...". That came totally unexpected on a German gun.

[@zonipoi]

@@TheFirstCurse1 G3 especially is a dream to clean and maintain in the field. The more mud you have, the better.

[@coobk]

yall forgot the g11...

[@Krankynator]

@@coobk The G11 is actually pretty easy to field strip.

[@underdog1252]

With the MG42 and MP5SD, he's not even doing obscure weapons anymore... _ian has remembered all the weapons._

[@crabmansteve6844]

No, everyone just misunderstood the channel name. This isn't about weapons that were forgotten, it's about all the weapons Ian forgot to tell us about. So he's rectifying that with this channel and his website.

[@mikaelblomkvist5755]

Ian, this is a german SMG. You can't say "The Cadillac of Suppressed SMGs". You HAVE to say "The Mercedes of Suppressed SMGs".

[@AshleyPomeroy]

"The Maybach of Mayhem"

[@LThaPunisha]

@@AshleyPomeroy looool

[@shura0107]

I've always compared H&K to BMW. Bavaria always thinks they're better than the rest of Germany, and BMW drivers like to lord over the rest of us poors, like H&K shooters. (In snooty German accent) Ve are H und K (pronounced "ash und kah") und ve are better zan you.

[@charlesdemers1197]

@@AshleyPomeroy Yes

[@menju32]

How about „The Porsche 911 of SMGs“ ? Both have nearly no competitors, both habe been built since the the 60s, both have a timeless design, both have special quality...and both are high-priced.

[@yuriyromaniw6629]

Ian: H&K got to work on a solution The Solution: H&K drilled a bunch of holes

[@IceWolfLoki]

The work is in knowing where to drill the holes and how many to drill.

[@WingMaster562]

"Drilling holes makes your gun better!" -Mikeburnfire

[@JO19pLuMbUm94HN]

Just that easy

[@mrkeogh]

They're speedholes.

[@mjfan653]

H&K - Holz in Kuns

[@senzelian]

I'm disappointed Ian. I came here to hear you say Schalldämpfer and you didn't even mention it once.

[@onpsxmember]

In der Tat...

[@JO19pLuMbUm94HN]

@@onpsxmember Alpecin KANN dazu beitragen, die Wachstumsphasen der Haare zu verlängern

[@onpsxmember]

@@JO19pLuMbUm94HN Es erleichtert definitiv den Geldbeutel.

[@CoDZockerLP]

@@JO19pLuMbUm94HN hed mi foi gfreid wenna schoidempfa gsogt hed. Nu dazua weila sie imma so mühe gibt dasas gscheid auspricht.

[@CoDZockerLP]

@@JO19pLuMbUm94HN bist du aus drittesreichland?

[@SheyD78]

I think the first time I ever saw one of these was in the movie 'Navy Seals' and the first time I read about them was in Tom Clancy's 'Clear and Present Danger'. I had no idea the gun itself was from way back in 1968. I thought it was an 80's thing. Crazy. Thanks for this and the follow on video!

[@Hoot]

Can someone who knows more about barrel threads/gun rifling explain something to me: Why do alot of supressors, like this one, screw in *counter-clockwise* (from shooters perspective) when the bullet receives a *clockwise* spin from the barrel riflings? Doesn't the spinning bullet eventually loosen up the supressor since it's spinning to the opposite direction than the supressor tightens to? Or is the contact between the bullet and the supressor baffles so miniscule that it doesn't really cause any loosening at all or what?

[@jimhans1]

The bullet should never touch the suppressor at all in a baffle type suppressor! There is usually .020-.030” or clearance between the bullet and the baffles. The gasses won’t impart spin on the suppressor either. When/if a can loosens, it’s usually from vibrations or heat expansion.

[@Hoot]

@@jimhans1 I see, thanks for the info!

[@edm240b9]

This weapon works incredibly well even indoors. I’ve fired the MP5A4SD that had a semi-burst-auto setting and it’s simply incredible.

[@robrs8631]

Ok, SWAT officer. Glad to know. Will just get one for myself. Actually, I like indoor shootings more than outdoor shootings.

[@heruiksanudin8942]

School I guess ?

[@yiaboi2287]

@@heruiksanudin8942 wtf

[@edwalmsley1401]

It really is impressive that after decades the MP5 is still the yardstick by which all other sub guns are judged

[@andersjjensen]

So much in fact that they have trouble selling their more modern UMP because the OG is still considered king of the hill everywhere by everyone.

[@edwalmsley1401]

@@andersjjensen H&K just nailed it first time I guess

[@andersjjensen]

@@edwalmsley1401 Strictly speaking the UMP is better... but armed forces have a tendency to be nostalgic and tradition bound... and on a budget! The UMP is lighter and even smoother on the recoil but it is also substantially more expensive. And as we all know: "90% of the result at half the price" tends to be a hard driving bargain.

[@alijankhan3330]

@@andersjjensen I thought the whole point of the ump was to create a cheaper more simply designed submachine gun for clients who couldn't afford the mp5?

[@CtrlAltRetreat]

@@alijankhan3330 It is, i believe Ian has a good vid of it up too. Tomorrow you're going to see the most extreme comparison between the two platforms because by all indications, this is the finest iteration of the mp5 platform. The controllability and accuracy of even the a2 is undeniably better than on the ump and that's with a higher rate of fire as well

[@rrphantom8194]

Can't believe germans engineers designed such a simple solution

[@Sleeping_Insomiac]

Probably the reason H&K didn't want to show Ian...

[@mariosebastiani3214]

They didn't put in the museum all the complicated ones they tried and didn't work... we'll never know.

[@humanbeing1675]

Pretty "ungerman"..😅

[@planetenwanderer5329]

simple or complicated doesn't matter. Efficiency is key.

[@bllau]

@Zach cash PUT A WATCH IN IT

[@urspicyasian]

“Why do it yourself, When Robots do it better.” -Echo

[@pukita7278]

"I am not a supresser expert... Yet" Why am I imagining a suppressed French rifle?

[@markusk1015]

Suppressed chauchat??

[@davetedder8196]

That's because it's never been fired and only dropped once.

[@DespairMMX3030]

Suppressed Lebel MLE 1886 or MAS-36?

[@22freedom33]

Mp5 player with an SD card?

[@crominion6045]

Exactly.

[@mistertililing5933]

I can't believe we have advanced so far in the music player industry!

[@WingMaster562]

Standard Definition, wait for the HD version

[@B1rd0fpr3y]

Yes, but this one is without sound

[@TheSurogate]

@Riesemberg and everybody before my comment, you all live in a different universe man....🤣😂

[@supercreamypudding9841]

Romeo One-One: We’re going deep and we’re going hard. Charlie One-One: Surely you can’t be serious? Romeo One-One: I am serious…and don't call me Shirley.

[@davidbrennan660]

(Someone play the tone on a trombone, for the love of God, Goddess, The Gods or Trans-dimensional Eldritch creatures. )

[@FamilyTeamGaming]

Tango down in Sector One-Alpha!...

[@osmanhakanturkoglu8686]

weapons free!

[@devinthierault]

Argentina Air Base Guard in 1982: "Boy I sure hope those guys don't land here."

[@fascistlobster]

We got a hull breach! Get down, get down!

[@highlandoutsider]

I don't understand why slapping a fat tube on the end takes a gun that, well, just looks like a gun, and all of a sudden makes it thee coolest looking weapon ever created 😍

[@ExtraVictory]

Its because you know its from HK so you know its technology bordering on magic.

[@kiloklavdi1185]

It's because: 1. HK gun and a Germany gun 2. A good R34 component

[@thadrobinson8343]

@@ExtraVictoryTeutonic gnome magic gives it +2 hit points despite reduced muzzle velocity.

[@ExtraVictory]

Germans are famously the biggest humans in europe with the best waifus that say guten morgen.

[@CadillacDriver]

You didn't need the 'and' in there.

[@jordansimmons3547]

H & K's engineering genius never fails to amaze me.

[@66kbm]

For the life of me i cannot find the Video that i commented upon with regards to myself ordering a "Forgotten Weapons" Polo. Anyway , it has arrived and i am delighted with it. Black Polo with the "Trademark" in the corner. I think it took a week, to the EU/Europe. That is quick i my experience. Thank you to Forgotten Weapons. I now own my little bit of History.

[@mistertililing5933]

"On your feet soldier, we are leaving!"

[@ItchyPilauBoto]

**sprints through sinking ship and jumps off into helicopter and almost dies**

[@battlefields2mine]

WHICH WAY!? WHICH WAY TO THE HELICOPTER!!!?

[@BatschkaPower]

Jump for it

[@aaronlucas2477]

@@bmw328igearhead GOD!

[@aturkishgamer9790]

Gaz: “Rules of Engagement, sir?” CPT. Price: “Crew expendable.”

[@Talon3000]

Which they apparently translated as "murder them in cold blood". Still irks me.

[@thesturm8686]

I thought they were referring to themselves, as in "if we fail, don't even think the MoD will pick us up"

[@justtoolleeow304]

@@thesturm8686 nah.

[@kothemagica]

Anyone mind explaining what does it mean?

[@CoDZockerLP]

@@kothemagica yes please

[@oiartsun]

2:42 - the closest I've heard to Ian uttering Jörg's signature line, "let me show you its features"

[@scottcrawford3745]

He'll never be able to approximate Joerg's Laugh, though...Can you imaging hearing that sound in a darkened room ?? Chills, and gooseflesh abound!!

[@Faltpferd]

I need a hint. Who's Jörg? Asking for a friend... Edit: Got it. The SlingShot guy. Sorry for the noise.

[@JavierChiappa]

@@scottcrawford3745 and then, your meat gets .. sampled

[@kbdekker]

In 2002 active duty USMC, I had the pleasure of a weekend of learning to load and fire weapons used around the world, AK, BAR, Galil, Uzi, G3 etc. I got to put three mags through one of these and it was the most amazing shooting experience I've ever had. It's an amazing weapon.

[@MatthewBaileyBeAfraid]

I had the SD3 version in the 1980s (retractible stock). Yeah... It was a beautiful SMG. The 3 tax-stamps for the SBR, Suppressor, and Automatic were pretty steep in addition to the price at the time, which was around $2.5K at the time (Damn they were so much less expensive prior to 1987). And it was very “quiet” for what it did as well. The integral suppressor was so much more effective than the screw-on suppressors of the Mac-10s/11s (although the Suppressed-Mac-11s were remarkably quiet, sounding nearly identical to “Snake Plissken’s Suppressed-Mac-10” in “Escape from New York”). Edit: They were a MONSTER to clean, taking hours to properly complete. And to repeat... since the question was asked at the end of the video, to directly address the question: It was/is TREMENDOUSLY EFFECTIVE at reducing bullet velocity. There were even “near subsonic” or “Fast-Subsonic” loads made specifically for the MP5SD that made the suppressor just “whisper quiet.” Literally someone “blowing a raspberry” with their mouth at the same time as the SD was being fired with the subsonic loads could be CLEARLY HEARD “OVER” the sound of the Suppressed SMG. Those rounds were developed specifically for CQB (Which at the time I heard as “CQC,” which was the term used at the time). They were also especially useful for not “over-penetrating.”

[@Hawk1966]

For it was on this day the Gun Jesus said unto us "Tomorrow it goes bang."

[@davidgreen40]

Really quietly.

[@borismuller86]

More like “fudd”.

[@Destroyer_V0]

Or hopefully, just repeated clicking noises

[@Hawk1966]

@@davidgreen40 an ity bity bang indeed.

[@haakonsteinsvaag]

More like "And the Lord gun Jesus said thau shalt have to wait until the next day in order to hear the holy grail of sub machine guns fire at the heathen targets, who shal be perforated by holy bullets in a quiet fashion, amen.

[@juliuscaesar5197]

I fired one of this and for some reason it always really hurt my eyes. I thought that it was the suppressor smoking, turns out the gun was not fully closing and gas was escaping through the bolt

[@juliuscaesar5197]

@keith moore I know it got fixed and it didn't hurt my eyes no more

[@onpsxmember]

Don't be so ungrateful. Others pay for gases blown in their face.^^

[@doranh6410]

Still, an MP5 would be great for one of those Senate meetings

[@collinis1]

Wouldn’t that mean it was firing out of battery? If so you would have had much bigger problems than some gas. I doubt that was the issue

[@juliuscaesar5197]

@@collinis1 I don't know. But it was not closing on the scale of like fraction of a milliliter. Tight enough that the gun works "fine", but loose enough that a little bit of gas was escaping and hurting my eyes Edit maybe it was like opening like a fraction of a second too soon? I dunno I'm not a gun expert

[@dangle933]

Only the Germans would think of making something out of "plain, drawn, aluminum, square steel tubing"

[@andrewlavoie6034]

Why?

[@whosliam5098]

@@andrewlavoie6034 cause we are sick

[@dangle933]

@@andrewlavoie6034 Because it would be steel tubing made from aluminum. Sounds overengineered...

[@MSgtHavoc]

Damn I read this comment right as he said it in the video.

[@rollastudent]

@@andrewlavoie6034 slowly read every word in the quote and think about it

[@M21Karl]

It's been 40 years since I used one and from what I remember it was heavy to me - but worth the weight because about all you could hear was the brass hitting the ground.

[@ricardoricardoricardoricardo]

"We will try that out tomorrow" Reason to live another day obtained.

[@maxkronader5225]

"I am not a suppressor expert. . .yet" Gotta love Gun Jesus.

[@borismuller86]

If anyone was ever perfectly equipped to become an expert in suppressors... it would be Ian.

[@oceanman3804]

The careless whisper

[@CoDZockerLP]

Pls explain for loosers like me

[@stevenbobbybills]

@@CoDZockerLP Careless Whisper is the name of a very popular song. The joke here is that one could apply that description to the MP5SD; quiet and without consideration or compromise. It doesn't care, it just does what it's meant to do. And it does that without breaking the sound barrier.

[@Menaceblue3]

🎷I'm never gonna shoot again🎶 🎵Guilty guns have got no rhythm🎷

[@grumples1517]

@@stevenbobbybills The Seether cover is actually quite good IMO

[@LipColt]

The song fits the MP5 perfectly, both are astonishing sexy.

[@theblackbaron4119]

4:30 "and if you look down there" is also my favourite trick to get murders look like accidents.

[@ryuhanja3415]

MP5SD is probably the most sexy and effective SMG I have ever used

[@Kellanium]

"The best submachinegun ever made" Ian, thank you for speaking so many truths. (but also, please explain further)

[@lukebailey3662]

Any shooter In existence: *heavy breathing*

[@bluemobster0023]

@TominBach until its time to repair it then you have mechanics on suicide watch

[@theblackbaron4119]

*school children

[@borismuller86]

*Plus we get to see Ian shoot it.*

[@CoDZockerLP]

@@borismuller86 Freue mich schon drauf

[@Stoney3K]

@TominBach Given that the magic is so good that they even decided to slap a G36 action onto an AR15 and make it a "better" AR15 being used by almost every special forces unit these days...

[@ChaplainPhantasm]

"The Cadillac of Suppressed Submachine Guns" Couldn't have been described better.

[@scratchy996]

"The Mercedes of Suppressed Submachine Guns" - there you go ;)

[@toolthoughts]

@@scratchy996 same came to mind just after seeing the title. but I guess there's a coke bottle inside the passenger side door or something

[@ChaplainPhantasm]

@@scratchy996 Gettin fancy ;)

[@scratchy996]

@@fuckinantipope5511 I'm a Porsche fan too, but "the Mercedes of..." is the international version of what Americans call "the Cadillac of..." It's funny because Fendt are called "the Mercedes of tractors" even though Mercedes had their own line of tractors :)

[@andybreadley429]

More like "The Maybach of Suppressed Submachine Guns".

[@magoid]

Since Maybach were long gone at the time this was made, and American cars were not the standard for excellence since the seventies, I happily accept "The Mercedes-Benz of Submachine Guns". All those dictators and John Lenon driving a Mercedes-Benz 600 (W100), cannot be wrong.

[@romannod5191]

@@magoid Maybach is now actually a very exclusive and very expensive line of Mercedes-Benz, so @Andy Breadley’s comparison works

[@magoid]

@@romannod5191 Actually it is reduced to a trim version of the S Class saloon. I wouldn't call it a brand, since they don't exist as a separate entity nor produce their own cars, like Cadillac do. But, whatever.

[@Wppk765]

Thank you! To call this the Cadillac is an insult to this fire arm. What, is the mp5 a piece over priced American garbage targeted toward old people who want to buy A luxury car but for some reason decides they have to have it American!?

[@ANSELAbitsxb]

@@Wppk765 Cadillac and lincon cars have improved are far more comfortable these days. BMW ect. for whatever have decided to make their cars more sporty and harder riding, I suggest you go try some out and pleasantly change your mind.

[@c.r.chandler5905]

I remember going through sub-gun training in the early 2000's and our instructor used a MP5-SD. The thing was so quiet that we didn't need ears on when he fired. All we heard was the drop of the firing pin and a whoosh of the round. He wouldn't let anyone touch that work of art.

[@someoneelse6934]

I had one assigned to me for my last few years on our SWAT team before I retired. I put tens of thousands of rounds through that gun through the years (literally) as we practiced at least twice a month a few hundred rounds at a time. It felt like shooting a staple gun. Very quiet and very, very little recoil. I miss it :-(

[@ADITADDICTS]

Ian: HK may I have a picture of the MP5SD suppressors interior? HK: No Ian: Ok, I'll just use the picture I took of it five minutes ago in the display case, thanks. HK: 🤦

[@Paelorian]

You'd think that after half a century, they'd stop acting like it's a trade secret. I'm sure all their competitors studied it decades ago. It's arguably the single most famous and highly regarded suppressor design ever. But modern suppressors have advanced in design since 1972. The cat's out of the bag.

[@ADITADDICTS]

@@Paelorian LOL very true.

[@Sleeping_Insomiac]

They're probably embarrassed by the fact that it's not overengineered up to the usual standard...

[@ADITADDICTS]

@@Sleeping_Insomiac Hk: we need more baffles!!

[@Stoney3K]

The alternative would be just as easy: Suppressor, meet your new best friend, "Angle Grinder".

[@Cousin_Uli]

this is absolutely the most excited that Ian's been doing a review in a long time

[@wraithwyvern528]

Perhaps the Germans are weaning Ian off of French firearms, although that's probably because Ian has covered +95% of French smokeless firearms in some fashion and they aren't too keen on making new stuff.

[@KenganConnosieur]

He is right to be excited cus I really am

[@ScottKenny1978]

He's excited because he gets to take it out and shoot it after this. I don't blame him for squee-ing.

[@GunsNGames1]

"Rules of engagement sir?" "Crew expendable."

[@sethsmith979]

Expandable hahaha

[@sethsmith979]

Expendable

[@installshieldwizard3017]

@@sethsmith979 As in Fantastic 4 lol

[@noway9320]

they're gonna inflate the crew?

[@GunsNGames1]

@@noway9320 according to my auto corrector, yes

[@plainguy4996]

The first chamber with the barrel holes deserves a serious look. It's almost like Ian knows but won't say. That's a heavy wall expansion chamber with no outlet. It absorbs a big chunk of the gas pressure as the bullet goes up the barrel but doesn't release it. It's apparently the perfect volume area to absorb the gas pressure and reduce the bullet velocity to subsonic. Then, the bullet clears the muzzle and all of that high pressure gas goes right back out the same holes and out the muzzle, into the suppressor section. Piff

[@batteredskullsummit9854]

I had the great pleasure of firing an authentic fully-automatic MP5sd at a gun range in Oklahoma one day. It was incredible. I was able to shoot groupings the size of a quarter at ~40 yards and the recoil was so negligible it felt like shooting a paintball gun. It had the perfect rate of fire: fast enough to put 2 or 3 rounds in a target in less than a half second, but not so fast it felt wasteful. It was very well balanced and pointable. Not to mention whisper quiet. The only drawback was the relatively heavy weight, which I didn't mind nor see as a drawback since it was mainly designed for acute, short operations rather than lugging around in rough terrain. To this day it is my favorite weapon I've ever fired.

[@saint-cetacean]

You can hear the glee in Ian's voice when he says "so we're going to go ahead and take this guy out to the range"

[@pseudomastix2916]

"I'll just relax here, and let Yokai do the rest."

[@MartinKirbits]

Rip echo

[@gonnegottkehaskamp1667]

Not anymore, since Yokai is now more visible than a disco ball in a dark room. 🤷‍♂️

[@XanVicious]

@@gonnegottkehaskamp1667 actual facts, they did my boy dirty :(

[@entertainme7523]

Are we supposed to know what this means?

[@davidfitzgerald792]

@@entertainme7523 yes

[@chrispy3473]

Straight Stock, Monolithic Integral Suppressor, Stippled Grip Tape, Sleight of Hand,

[@Thecarbonviper]

I borrowed one of these from a guy I met in an SMG/PCC class a few months back and got to run it in a shoot house. Probably the most fun full auto gun I've shot. I could pretty much drop all the rounds right on top of each other at 30m. Only issue is how heavy it is. Almost twice as heavy as my APC 9 I was running. But what can I say, its an mp5sd, and its awesome

[@RoscoesRiffs]

Great weapon. I got to shoot them a few times back in the 1980s. The sound of the bullets striking targets was louder than the firing sound. Superbly dependable.

[@Chameleox]

Not sure you can call this a “forgotten” weapon. But it’s Ian, so I clicked.

[@noway9320]

it's just the series name, man

[@CoDZockerLP]

@@noway9320 exactly

[@Chameleox]

@@noway9320 I know, just gotta appreciate the irony.

[@LipColt]

Well, people know it very well. But they all go silent on it.

[@b-beale1931]

It's not forgotten, you just never hear it being used

[@TokamakUK]

Looks a bit reminiscent of a Tesla valve to me...

[@florianb1982]

Exactly what I thought.

[@altair1983]

Same here!

[@letsgocamping88]

Smarter every day did a slow motion look at some suppressors with similar workings, the cans were transparent to show off what’s going on inside.

[@Seelenschmiede]

@@letsgocamping88 with some nice suppressor explosions :P

[@discerningscoundrel3055]

A little, yes, but it lacks the key feature of a Tesla valve, which is diverting the fluid deflected by the angled baffles back across the fluid stream to force fluid into the next baffle, and so on, which is what causes the radical difference in resistance to flow in one direction compared to the other. Effectively, although it has no moving parts, it uses diverted fluid as a valve to divert more fluid. It's kinda hard to explain without a diagram. This doesn't have that, because of course it isn't trying to allow fluid flow easily in one direction but not the other, but it does share the angled baffles. Now I'm wondering if HK's rather simple and effective manufacturing technique would work for Tesla valves.

[@jonminer9891]

Hi, Ian. That is a fine example of when German design is not over-done. Thanks for sharing! Stay healthy!

[@6bmw]

my all time favorite weapon i own. i got one on my 17th birthday which was also the same day i enlisted in the Army and have had it for 3 years now (it has been sitting in my gun safe for certain periods of time while i was leaving for army etc) and is still flawless

[@semibreve]

Man first the MG-42 and now the MP5SD, Ian's really spoiling us with the cream of the crop recently

[@mrcannotfindaname]

The 6 dislikes are those who got ambushed by MP5SD out of nowhere.

[@ManlyPastry]

"Squad, we've got hostiles!"

[@Preinstallable]

λ

[@wazkangz955]

Wait a minute, this isn’t a forgotten weapon... I’ll still watch anyway

[@cheapolegunguy]

I was issued one in 1980, it's my favorite out of all the weapons I was ever issued, nice rate of fire, so quite and accurate for what it was made for :)

[@jacksonlefteye]

that square tube front baffle is amazing, H&K are absolute geniuses

[@johnstevens1575]

Brilliant suppressor, given the time it was developed. I think most of the more 'modern' designs owe a debt to this marvel of German engineering.

[@AlmantasKli]

yea, baybee. I was excited to see this boy come back to CS when it was announced for CS:GO

[@foxtrotdelta225]

6:31 Even though his nickname is gun Jesus he still admits he has gaps in his knowledge and isn’t infallible but he’s working on it. This is just one reason your great and we love you and your work! Edit: spelling Infallible yet of course

[@Clash_CT_Rocker69]

The H&K MP5/SD3 was the first weapon I received when I joined the Special Police of the Republic of Croatia in early 1991. An excellent weapon for the police or special forces. Later, when in the middle of '91 The command transferred to the 3rd Guards Brigade as an instructor, I took a "slightly" stronger model H&K G3/SD1, which was a real military assault rifle with OS.

[@MSRLR]

My dad used one of these when he was a Ranger in the 80’s. Mp5, m249 and m82 were his favorites

[@DustyGamma]

"Alpha, go! Bravo, go!" "Gottem!" "Tango down!" "Transporting precious cargo."

[@Volatile127]

What a great game.

[@MisterAndrewBuckley]

All the way Although those stupid eyes blinking at you from their goggles usually when you're stuck in a doorway... And you hear footsteps

[@shaider1982]

Rogue Spear! 👍🤣

[@linksbro1]

"A Resonance Cascade? At this time of year, at this time of day, on this side of the border-world, localized entirely within our facility?" "Yes!" "... Can we stop it?" "Mmmm... No." *_"AAAAAAAAAAAAAHH!"_*

[@scipio10000]

That suppressor structure looks quite like a Tesla hydraulic non-return valve.

[@wk3818]

I saw one of those in another video and it does the same thing with a different type fluid. Expanding gas instead of a liquid.

[@justtoolleeow304]

That's kinda what it does tho right? I imagine that the gases are slowed down, increasing the pressure and creating vortexes and turbulence, and overall absorbing a lot of kinetic energy

[@theacme3]

ah damn it, you beat me to it. Now my comment makes me look like a copy cat :(

[@largemarge1603]

@@theacme3 "There, there. It all will be OK pretty soon. I know you feel terrible right now. Just remember: * You will have other races, other opportunities to excel. You just hang in there, Champ!"

[@Mothdir]

Very much loving the cut-out view of the suppressor. Obviously everything can't be disassembled so I really enjoy the exception here! Really nice details shown on this model , thank you.

[@Fiftyfiv3hundr3d]

I am not a gun enthusiast by any means yet I thoroughly enjoyed this video. Loved the history and engineering breakdown. Really interesting.

[@loel2312]

The MP5SD is a legend!

[@TheChuckFina]

" ..... so we're going to take a look at a cutaway of the suppressor." Me: (Gasps with excitement)

[@kippamip]

Music to my ears "we're gonna go ahead and take it out to the range".

[@Mercymorn99]

This has been my favorite submachine gun design since I first saw it years ago. Beautiful suppressor

[@TheStraycat74]

as an HK-94 owner, I approve this video. for those that do not know, an HK-94 is the USA Civilian legal 16inch semi-auto carbine version of the MP-5. easily the finest PCC I own, and worth three times as much as my semi-auto Thompson (new semi-auto thompsons are $2,500-3,000 btw)

[@mikeblatzheim2797]

Just a note for your description (and in general), when you can't write an Umlaut (ä, ö, ü), the correct way to write it is ae, oe, ue, so 'Schalldaempfer'. The sound is different to a normal a, o or u.

[@vaclav_fejt]

Ah, I do that all the time at work. Writing German notes on technical drawings...and for some reason, the system doesn't do Unicode, so I have to turn all umlauted letters into twins.

[@ekscalybur]

Anybody else say "Hey Ian" when he says "hey guys" at the start of his videos? Ok, I'm weird.

[@airgottenweapons5609]

I do every time!

[@mattisvov]

Not until now I haven't...

[@justindunlap1235]

I never thought about it till now. But yes

[@evangoodwin4698]

I’m definitely going to every time now. It’ll drive my brother nuts cause his name is Ian😂

[@ianfurqueron5850]

Since I'd be saying, "Hi Ian" to myself... also named Ian.... No.

[@ichuisaac123]

"Aluminum square steel tubing" *Confused German screeching*

[@gar4584]

We had one SD on my narco team. It was awesome and we all fought over it. On range days it was shot by everyone, and would become fouled to a point of being unreliable after about 300 rounds. But it was super quiet.

[@JeremyKrullSS]

Firing one of these was one of the most fun almost toyish experiences I’ve ever had with a military weapon. It just kinda hums and vibrates. If I had an SP5 and lived in a free state I’d clone it.

[@donny8619]

I feel this video was a long time coming

[@djackmanson]

"He mean Lexus but he ain't know"

[@cuffzter]

I recognize that quote and I ain't even seen The Wire

[@jakehyams8659]

The Japanese mercedes I say

[@rickgao2969]

King of resale value and reliability

[@ExtraVictory]

Nobody is surprised that Germans and Japanese continue to make the best stuff in the world. If you see made in China on something you would be unhappy, if you see Made in Germany or Japan, you'd probably bet your life on it lmfao.

[@ollanius_papyrus80]

“We took an MP5 and replaced its barrel with an M203”

[@justanothergunnerd8128]

I shot one in Vegas. It's a fantastic SMG - so quiet - even on full auto. And easily controllable - I introduced my lady friend to this as her first full-auto shooter. She loved it.

[@randomidiot8142]

This design is so archaic. Reminds me of the write-ups on 07/02's retrofitting old 'hollywood quiet' guns that are most definitely not hollywood quiet with newer cores and components that make them MUCH quieter. I saw a cutaway Tom Denall had and it was a much different stamped core. The design of this one also has a large volume to work with, and it is way easier to achieve suppression through raw volume vs intricate flow manipulation in a smaller package.

[@Women_Rock]

Interesting. I didn’t know the MP5SD could suppress sonic ammunition.

[@KevinCLECH]

Ian: The Cadillac of submachine guns. German engineers: 🤬

[@Wien1938]

Do you think that, together with Eugene Stoner, H&K were the finest firearms engineers of modern times?

[@brokenspine66]

Add the folks at Kalashnikov to it and you probably right.

[@walterscientist]

H&K guns were designed by a team, that does not really count IMO.

[@brokenspine66]

@Las Armas y Fatman A matter of facts, if somebody like it or not.

[@ExtraVictory]

Its really an insult to HK, even putting anyone else in their league. They're the best bar none. And id feel pretty confident betting that they will continue to be the Greatest of all time, never to be unseated. But thats just me

[@Wien1938]

@@ExtraVictory Eugene Stoner is a good comparison. The AR series is really a good system - not perfect (neither is the RDB H&K series, both have their faults) but both are quite mud resistant.

[@peterresetz1960]

I fired a MP5SD with supersonic 115 gr, and 124gr, and subsonic 147 gr ammo. With the supersonic ammo it still had a report, but it was not loud by any measure. With the subsonic ammo the only sound was from action cycling and the ejected spent cartridge cases hitting the ground. I should add that when firing from the left shoulder there was some gas blow back onto my face when the action cycled. Also. When fired in full auto, recoil was almost non existent and very easy to keep on target.

[@jayhickey5012]

Having had intimate first hand experience operating this weapon I can tell you that it's one of the finest sub guns on the planet.

[@N-GinAndTonicTM]

Heckler And Koch truly are Master's of their craft