H&K's Experimental SMG and SMG II for the US Navy

/ forgottenweapons
Cool Forgotten Weapons merch! shop.bbtv.com/c...
In the 1980s, the US Navy requested a new submachine gun to replace the MP5 then in use. In particular, the Navy wanted a gun that was optimized for use with a suppressor. H&K built two models of experimental guns in the 1980s to meet this request, creatively named the SMG and SMG II.
Both guns were hammer fired, closed bolt designs that used simple blowback actions. They had collapsing stocks similar to what would later be used on the MP7, and vertical front grips. The early pattern had a remarkably complex rear sight offering two different sets of range calibrations for subsonic and supersonic ammunition (out to 150m). The SMG II reverted to a more standard HK drum rear sight, but added a very interesting velocity-reduction system. A pressure vessel under the barrel was connected to the barrel via a set of holes just in front of the chamber, and when opened it would reduce chamber pressure and thus velocity. It could reportedly reduce muzzle velocity from 350 m/s (1150 fps) to 305 m/s (1000 fps), thus bringing it below the speed of sound.
The Navy tested both models, and decided that neither warranted replacement of the MP5. No other sales were made of the designs, but much of the developmental work would be put into the UMP program that came afterward.
Contact:
Forgotten Weapons
6281 N. Oracle #36270
Tucson, AZ 85704

[@BSE1320]

Navy: We want it to be cheap. H&K: lol

[@edwalmsley1401]

"But not so cheap that we cant afford a forward assist,we're really anticipating a need for that" 🤣

[@charlesadams1721]

In the government, the DoD, the Navy, they spend more on parking lot markings at the Naval Development Offices, In Dod speaking, "cheap' means less than $1,000,000.

[@victoreem2]

*laughs in H&K*

[@larpak3711]

And buys a f...g fully equiped aircraft carrier.

[@thatcrappyyoutuber1173]

*laughs in 9x19mm*

[@AllAboutMiims]

SMG 2: This time it's personal

[@MrRobbi373]

SMG 2: Velocity Boogaloo

[@AllAboutMiims]

@@MrRobbi373 SMG 2: electric boom-aloo

[@Taistelukalkkuna]

Next SMG 3: Revenge of the HK.

[@AllAboutMiims]

@@Taistelukalkkuna SMG 4: last of the mo-HK-ians

[@wylnd]

Is that a periphery pun?

[@TheRogueWolf]

"Put a forward assist on it, Heinrich. You know how much the Americans love those things."

[@asdf-ne1vt]

"Does it do anything?" "Nein, but it looks cool"

[@larrymcjones]

Haha spot on. “But you can stealthily close the bolt!”

[@sabrepaw]

What does it do?

[@TobiasHinz1992]

@@sabrepaw if the gun jams, the forward assist makes it worse. That's the only function of this button.

[@Timber_LXG_5]

@@TobiasHinz1992 I've used it and it fixed the problem, at least on an ar

[@mr_demeanor6008]

HK: invents a way to switch velocity to subsonic at the flip of a switch. US Navy: that’s not cool enough.

[@tacticalsocialist8060]

@@TheFirstCurse1 because its the us

[@LamborghiniDiabloSVPursuit]

You know the fact that a gimmicky "velocity switch" hasn't been tried in any mainline firearm to date, probably means that it doesn't work as intended, which is why the Navy didn't like it. The thing you people have to realize is that, the simpler the firearm's operation is, the more reliable it is.

[@mr_demeanor6008]

@@LamborghiniDiabloSVPursuit or they haven’t made one reliable enough. But yes, you are right. Simplicity is king in most circumstances.

[@LamborghiniDiabloSVPursuit]

​@@mr_demeanor6008 TBH its more of an issue of practicality. Its a lot more practical to modify existing guns to fire reliably in subsonic, than it is to procure an entirely new gun, just for this single feature. You could make this sophisticated gas bleed system that probably won't fit a decent number of guns in your current armory, requiring you to buy entire, new stocks. Or you could just modify the existing platform to fire on subsonic instead by changing out a few of the parts. Or in other words, what they did with the MP5SD.

[@sudilos1172]

As an American living with in 2020s I confirm we are pretty dumb.

[@AgentTasmania]

I enjoy the selector markings on these. No bullet, 1 bullet, 3 bullet, all bullet.

[@Hawk1966]

And at 1,000 rounds per minute they really mean ALL.

[@1ytcommenter]

@@Hawk1966 thats an approximately 2 sec. burst.

[@actualperson1971]

It's just a thirty round burst

[@sweelseal4307]

"All bullet". I like the sound of that.

[@dafunk420]

but thats like basic? lmao

[@balcsi32]

if SMGs are so good, why isn't there a SMG 2? HK: Hold my beer

[@AnD1262]

but wait if we insist on translating "Maschinenpistole" as "submachine gun"(as we do) HK made the SMG 5 before they made the SMG and the SMG 2 and then instead of making SMG 3 and 4 they made the universal SMG and the SMG 7

[@ILGAROD]

@@AnD1262 aaaaaand what if MP5K is the shorter theatrical release and MP5SD is the directors cut with different audio mastering?

[@AnD1262]

@@ILGAROD I haven't heard much of the SMG5 short edition other than its cameo in BF3 I've yet to meet anyone who disliked the SMG5 sound dampened edition the directors really did a good job i think

[@darykeng]

@@AnD1262 Sooo... they did own Star Wars sage by this?

[@AnD1262]

@@darykeng I mean yes that was the implication but tbh guns names are really amusing when you look into them FN Herstal comes to mind for instance one of my favorite guns is called the "FN Project 1990" (yes they were that lazy when naming the P90)

[@Shydood]

_"What's your favourite SMG?"_ _"The SMG."_ _"No, I meant a specific one."_ _"Yeah, the H&K SMG."_ _"You meant the MP5?"_

[@Vibakari]

“I like the SMG.” “I like the SMG 2.” “So we agree.” “No! I said I like the SMG 2!” “Yeah you like the SMG too.”

[@screamsinrussian5773]

@Omne Obstat what

[@harrylou90]

Whats on second

[@screamsinrussian5773]

@@harrylou90 what do you mean

[@bobthebuilder1360]

potter where third

[@SuperCortes10]

Now imagine if the “30” on the selector switch really just stood for 30 round burst

[@ManOnTheRange]

@S F nope... HKs reset after trigger release :)

[@Medicopter_N7]

@S F If I remember correctly, that one of the problems of M16A2 is that unreliable burst ratchet thingy thing that was causing malfunctions if you let go of the trigger before it does a three round burst. I think Ian said that in one of the videos, but since there's no dedicated M16A2 videos that fact may have been a drive-by mention in one of the other videos. So I'm assuming that HK's burst systems reset after incomplete burst.

[@bobthebuilder1360]

@S F the famous in farcry 4 does that

[@vaclavjebavy5118]

that's literally full auto if we assume it would work like most burst fire modes.

[@17MrLeon]

@@Medicopter_N7 it didnt cause jam but if you fired burst but reset after obly two shots next trigger pull you got obly ehats left of ote burst so you would fire only one round. Overall it was useless 3 round bursts is exoirinent of the oast that has no placen in present times.

[@snakeeyes941]

Navy: "So we want a durable SMG that is made for use with a suppressor" Any sane person: "So you want an MP5SD" Navy: "No"

[@borismuller86]

corporal grif Navy: “Here’s the thing; we have a bunch of money we’d like to spend unnecessarily.”

[@sneakeypete]

to be fair i'd say it was a bit more like 'We wan't one thats better than the MP5SD we've already got', and there wasn't enough of an improvement as mentioned

[@darkiee69]

@@sneakeypete It's hard to improve on near perfection. And keep costs reasonable. ;)

[@12345NoNamesLeft]

Why the "So" ? Just say "No"

[@kshatriya1414]

Americans importing other countries weapons?, You wack?

[@Nobody-iv2ot]

I can see some gun enthusiasts getting into an argument over the names of these guns. “What gun is that?” “It’s the HK SMG.” “I can see it’s an SMG but what’s it called?”

[@kirbyis4ever]

I suppose "The HK SMG, developed for the US Navy, 1980's 9mm" would be a bit of a mouthful.

[@stevenbobbybills]

I suppose we can informally call it the MP6.

[@lonelypotato520]

Who’s on first

[@shooteveryday1841]

What’s mine say? Dude! What’s mine say? sweet!!

[@bulldowozer5858]

"It is an SMG, therefor calling it anything else, besides SMG, would be false" -HK (probably)

[@ootdega]

Okay, that velocity reducer mechanism is *_really_* freakin cool.

[@Solnoric]

Sounds like a pain in the butt to maintain though. That would be really fiddly and take a bunch of extra care to keep running.

[@windhelmguard5295]

@@Solnoric i do not see that as a problem, you won't be using the low velocity setting in a prolonged fire fight anyway, once the enemy knows where you are you switch to high velocity to get more stopping power and that prevents dirt from getting into the mechanism.

[@simonr8721]

@@Solnoric I dont think so. I mean its just a tube, probably screwed on the part that is connected to the barrel. Just stick in a brush to clean it. Not to mention that the high/low-velocity-switch would only stop working if the gasses couldnt get in the tube, which would need enormous amounts of carbon.

[@bavarianpotato]

@@simonr8721 also let's not forget this is no vital part of the gun. Sure it's a nice feature, but if it's totally messed up, the gun will still work as well as any other smg

[@moosemaimer]

I had an idea of using a system like that to delay the action until the bullet had left the barrel, and then I saw another video where somebody had already tried it like 70 years ago.

[@DeHerg]

"Windage adjustment knob, which is unusual on a SMG ... really precise, almost weirdly precise sights..." HK: Vhat? Ve even left out ze coriolis compensator.

[@nickgreen2394]

Lol took me a second to get that

[@gregorycomey]

One of the coolest looking H&K guns I've seen.

[@j.yossarian6852]

IKR? Love the flat sides.

[@j.yossarian6852]

Does the forward assist add or subtract cool points

[@pixelkraut3428]

I Most like the hk g 36 c

[@TheCheat_1337]

In this case I think the forward assist is probably meant to be a quiet bolt closing mechanism for maximum silence

[@timtyler3524]

@@j.yossarian6852 The only thing it adds is another $1000 to the price.

[@animq4ionboi.153]

Man the Sesbian Lex Horror Game is so popular they made germans IRL!

[@tooFarGonexk4he4tu3s]

SIGNALIS mentioned I was wondering what was the prototype of the SMG in the game. Answers that question

[@matthayward7889]

You had me at ‘experimental HK SMG’

[@BatCaveOz]

Me too.

[@Seb-Storm]

X3

[@tsukishiro70]

This gun is the basis for the 10mm SMG in the Bethesda era Fallout titles, especially in Fallout 3 and Fallout New Vegas. Nice to see a couple of the real ones.

[@MrYaniv99]

tsukishiro70 really?

[@Talon3000]

oooh thats why it looked so familiar.

[@ethanblevins1116]

Thanks for that fact!

[@Arhiman93]

They also resemble warhammer 40k primaris marines bolt carbine wh40k.lexicanum.com/mediawiki/images/d/d7/BoltCarbine.jpg

[@thkarape]

It's also the SMG from GTA IV

[@baronofhell2277]

They look like Mp5's made for Judge Dredd's justice department.

[@limpetarch98k]

I am the law. *Flashbacks of CS:S Jailbreak breakdown*

[@irusan_san]

More like if an MP5 and a UMP had a child

[@TheArklyte]

Justice department? You mean population control, right?:\

[@WanderlustZero]

Cheap US Navy refused to fund the voice-activation, palmprint ID and Hi-Ex ammo :(

[@HappyBeezerStudios]

FLARE!

[@Talon3000]

"improve on the MP5" now THAT is a task

[@0num4]

They did manage to get the bolt to lock to the rear after a magazine... Pretty big for an SMG of that vintage

[@charlesfollette2655]

The ump lineup couldn’t improve on the mp5

[@Dimetropteryx]

@@charlesfollette2655 Yeah, the MP5 still seems to sell like crazy.

[@feraligatorade99]

Honestly the only thing I would change is to add a bolt catch and last round bolt hold open. But the MP5/10 already has that, so...

[@spreademu1218]

Talon One laughs in UMP-45

[@jcgarrett4605]

Ian already putting out them hitters. 2020 starting strong

[@slayersangelripper83]

trynna get them out before ww3 start

[@mw3fanatic]

If only you could've looked forward and seen what 2020 was to bring.

[@SirDiabz]

This comment didn't age well given the current state of 2020

[@FrankyBabes]

@@SirDiabz On the other hand, Forgotten Weapons has gone from strength to strength

[@happyveliz]

Oh you sweet summer child.....

[@Local_Waifu]

ACHTUNG Remember our promise.

[@konnigkratz]

They make the UMP look like a pre-production gun to me, very nice aesthetics!

[@dearcastiel4667]

Yeah the UMP is far from being their best looking gun...

[@Breakaway-ic5gj]

UMP looks better than MP5 imo

[@arcuz7862]

@@Breakaway-ic5gj Your opinion is wrong and you should be ashamed.

[@edm240b9]

It looks like a UMP that takes MP5 mags, fitted with an MP7 stock, an Uzi charging handle, M4 forward assist, and profile similar to a Beretta M12S.

[@GaryHamad]

so 5 guns having an orgy came out with this?

[@isaacschmitt4803]

@@GaryHamad I'd watch that. . .

[@CtrlAltRetreat]

@@GaryHamad I get berated enough about "gun porn" enough as is.

[@user-njyzcip]

It doesn't take MP5 mags…

[@isaacschmitt4803]

@@user-njyzcip MP5-like mags, at least.

[@russetwolf13]

They should have followed Kelly Johnson's iron clad rules of project managment. "15. Never do business with the Navy! They don't know what they want."

[@demonprinces17]

But have a big check book

[@dieterhrabak4947]

So it is ok to dragging the project for so long and have costing so much that the end product should it eventually comes to it, prohibitive expensive and still requires more RnD times and money..? And everlasting military project.. Sounds much like the JSF to me..

[@russetwolf13]

@@dieterhrabak4947 Are we talking about the Joint Strike Fighter? Because for one, Kelly Johnson has been dead for decades. For two if you're talking about Lockheed they haven't dragged anything out, that's not how the F35 got so expensive or took so long. The F35 started as a flawed, impossible project to replace most Fighter and Attack aircraft in the arsenal with a single plane. This is basically an impossible task right out of the gate, but they also wanted it for every branch (and yes, the navy has held the project up for years by requiring twin engines). This means the same plane has to be capable of catapult launch and VTOL and STOL under load, as well as capable of carrying every weapon in the arsenal, and they asked that it be stealth capable (so no external weapon racks). And it had to be small, cheap, and use advanced radar and entirely new electronic cockpit control systems. So it had to be Carrier launch capable, an air dominance fighter, a light bomber, a ground support jet, a jump jet, and it still had to supercruise and have high altitude performance along with low altitude performance. Lockheed is literally the only company with experience building stealth fighters, since they built the F-117A Nighthawk and the F-22 Raptor, so they're defacto the only company that could do it. Oh, did I mention the other requirments? Like Concurrent Production? They told Lockheed to start building the plane as soon as they had a working prototype. I huge chunk of the cost has gone into making unfinished planes and then updating them over and over while the development cycle is still ongoing. So if we're talking about Lockheed dragging their feet, remember, this was an impossible plane mashing multiple contradictory requirements together that the Pentagon wanted built before it had even finished test flights. Given that the impossible plane is currently flying Lockheed should probably get a fucking medal for making that pile of bullshit even half functional.

[@toggtlas7099]

@@russetwolf13 - This comment was brought to you by the Lockheed marketing department; Lockheed, strongest there is.

[@russetwolf13]

@@toggtlas7099 If I were with Lockheed I'd be saying the F35 effectively achieved all of it's design goals and is the greatest fighter they've ever built. It doesn't, and it isn't, that's the F22 that everyone decided was too expensive. Keep in mind the F35 is the most expensive weapons system ever developed and we literally could have built thousands of F22s and upgraded our existing platforms for half the cost but, you know, sunk cost fallacy is a strong one.

[@user-yu4ue1bl1p]

Signalis is such a good game, I wish Germany was real...

[@Lugia21]

"They spent 18 months testing" Sounds more like they used them and to avoid tracing just didn't order the rest.

[@DFX2KX]

.... That's a real possibility. What better test then actual field use, afterall!

[@victorwaddell6530]

Lost in a boating accident . Over the Marianas Trench .

[@andrewince8824]

Wouldn't shock me. They ballsed up in Vietnam with their attempt at plausible deniability. The yanks had S&W copy the Carl Gustaf M/45 but S&W did what they do best and slapped their logo big and bold on those things. At least with a unique, largely or even entirely unknown H&K design it's easy to deny knowledge.

[@gregoryfilin8040]

That would make sense why it was called the SMG. Good deniability on paper.

[@rotwang2000]

Simply put : Glock had one gun idea, H&K had all the others ...

[@MrRoboskippy]

Glock didn't do anything that someone else didn't already do.

[@cnlbenmc]

+@@MrRoboskippy+ They just made it cheaper, more practical and most importantly; did so at the right place and the right time.

[@CastleBravo023]

.....except HK brought out a production polymer frame pistol WAY before Glock. So, no.

[@LoanwordEggcorn]

@@cnlbenmc The Glock short recoil lug is a brilliant simplification of John Browning's recoil link.

[@LoanwordEggcorn]

@@CastleBravo023 The significance of Glock is both polymer construction and the very simple short recoil lug. HK pistols were generally more complex and therefore less practical. Both are good; Glock is better due to being simpler.

[@charlesphillips4575]

I suggest the SMG 2 has a lighter bolt to give reliable functioning with the reduced pressure caused by the low velocity setting.

[@MrHws5mp]

Alternative theory: it also has a burst selector, so having a high rate of fire ripping through your ammo supply on full auto isn't so much of a problem. Making the bolt lighter and the RoF faster then means that the gun is lighter and the three rounds in your burst probably group closer than a burst of five or six at 600rpm.

[@charlesphillips4575]

@@MrHws5mp Or switch cause and effect. The lighter bolt gave an excessive rate of fire on the high velocity setting, so they added a burst function.

[@LoanwordEggcorn]

@@MrHws5mp Yes, higher rate of fire is needed for less vertical dispersion (muzzle rise) in burst mode. SMG version 1 did not have burst fire.

[@KamikazKid]

Things I love about H&K: The precision The engineering The ergonomics The quality Things I HATE about H&K: The Price

[@drezwider]

KamikazKid the price

[@nandobuchhorn9771]

As a German this make me proud

[@erilgaz]

This sums up german guns AND german guns

[@Briggsian]

They are the Porsche of firearms

[@arcuz7862]

Don't worry. H&K hates poors like you just as much.

[@stone9302]

I feel like this would be a great sidearm for cataloguing locations in the Capital Wasteland

[@stone9302]

@AliasSLH Don't forget no firing sounds on occasion

[@fckgooogle1000x]

A great repellent for Giant Radscorpions

[@oso1165]

Nobody: US Navy/Army: F O R W A R D A S S I S T

[@VMEMotor5]

While the Air Force shakes it's head.

[@bluecaptainIT]

Marines: *cheerfully eating crayons* Hu-ah! Coast Guard: Sure, I guess... Space Force: NO!! That thing may weight too much for a booster!

[@jzargo7443]

"If SMG's are so good why isn't there a SMG 2? *H&K has joined the chat*

[@FirstMetalHamster]

Those are some beautiful guns... They have that 80's scifi aesthetic.

[@rasdread0989]

I love how modern firearms innovations during the 70-80s/early 90s were wacky contraptions and things..nowadays accessibility would probably means slapping a pic rail/RIS everywhere and basically just stick anything into it

[@williammagoffin9324]

No side-mounted charging lever for the HK slap? I can see why no one bought it.

[@Darthdoodoo]

I dont understand why people love the slap its a cheap ass way to design it and someone in marketing made it a cool feature 😂😂

[@duncanmcgee13]

When a military branch asks you to develop a new gun but then remember its an American branch so you have to make it look similar to the old one

[@user-is1lo9dx2i]

MP5 is the M16 of HK. Like the US Army, they want to replace it,but never work out one way or another.

[@shawnr771]

I would take an MP5 as a personal weapon.

[@BrownSofaGamer]

陳奕釩 Well it’s for identical reasons. Both the M16 and MP5 have been being developed and improved for about half a century at this point, and now everyone’s run out of ideas on how to improve on them.

[@SuperFunkmachine]

@@BrownSofaGamer We know how to make them better it just A) that what people do B) that would cost to much an what we have is good enough.

[@FieserMoep]

@@BrownSofaGamer The "issue" with the M16 and MP5 is that they are good designs for our current era of fireams (Which has not really advanced that much TBH). They do their job just good enough and without the risk of any large scale engagement there is no point of getting rid of arsenals full of guns and training invested into service men. There are better guns, but why pay for several thousand better guns if your guys only stand guard with those anyway.

[@andrewince8824]

H&K make nice weapons. The 416 and 417 really allow the AR-15 and AR-10 platforms to be modern, adaptable weapons. The MP5 is nearly mythical. The USP is about as good as one needs a pistol to be with the MK23 lending itself to the crazy big pistol group. You can quite comfortably equip a squad with H&K weapons and not feel like anything is missing. 417s for the DMR and SAW (configured appropriately), 416 for the riflemen, USP on the hips and that's a squad sorted. The MP5 is compact enough to be carried by the DMR guy for CQB situations.

[@QuinnyOnMain]

yo I love Signalis

[@nigelpersonalinformation1140]

rule of 6

[@denismaksimov3775]

This very gun inspired the notorious 10mm SMG in Fallout 3. Never thought I would see a real life version of it. Thank you!

[@planescaped]

"Proprietary mags that are non swappable with the MP5" There's yer problem...

[@bavarianpotato]

Yeah I don't get the reasoning behind that. Would've saved some cost and made the whole thing more interesting to the navy.

[@jackmcslay]

@@bavarianpotato Being a prototype neither the navy nor H&K expect the design details to be on a potential final product and they probably made a different mag because it would be easier to just make a different mag to go with the prototype than waste time figuring out a means to have the button mag release to work with the standard mags that have a different mag release.

[@user-njyzcip]

Maybe MP5 mags won't be able to support a bolt hold open feature?

[@bobthebuilder1360]

@@user-njyzcip MAKE THEM WORK FORCE IT THEY ARE HK HK GUN GOD

[@claudiodiaz9752]

Even worse, no slap.

[@iflystuff1]

8:45 I would like a 29 round burst....Just you could mag dump and then look at your opponent with a steely gaze and say.. "did I fire 29 or did I fire 30......"

[@generousghibli6031]

That is the most AGGRESSIVELY 80s gun design I've ever seen.

[@bennnoboyo5238]

*ROTFRONT.*

[@Thedoomdude100]

I can’t believe the Blockwart didn’t order more of these things for Sector C’s protektor division.

[@bennnoboyo5238]

@@Thedoomdude100 they really missed out

[@MayaK_A]

Signalis

[@b0cket380]

Golden eye 007

[@brandonobaza8610]

Navy: Asks H&K for experimental SMG, tests it, doesn't want it. So, they couldn't make this teleport either?

[@JunRozenovich]

11:47 I love how he say "low"

[@sawyere2496]

I’d love one of those SMG 2’s. Seems more fun to use than even an MP5. The controls look convenient and the velocity selector switch is just cool as hell.

[@davidbock8282]

"Where does he get those wonderful toys?" "H&Ks Grey Room."

[@anon2234]

The legendary heaven that all good warriors go to when they die.

[@BatCaveOz]

At first I thought having front hand located so close to the muzzle was a bit of a safety issue. Fortunately a suppressor fixes that. H&K - you the real MVP!

[@bavarianpotato]

I think the front grip fixes that

[@leventemontana1755]

Now Ian needs a surgical mini camera with light, to see things like velocity changing holes inside the barrel

[@HALO-2304]

These are yet another example of H&K's engineering that I absolutely love! It's unique and (cliche) out-of-the-box. And, holy fuck, the rear sight on the SMG is the most German-y thing I've seen since the insides of the G11!

[@soviet_idiot]

This is a real treat. I've never heard of a experimental SMG for the US Navy, I always thought the SEALs just request modifications for the MP5.

[@dougler500]

I just love HK. Their lead design team is a group of geniuses in not only high quality design but in practical user interfaces and also aesthetics.

[@RusskiBlusski]

This is one of my favourite SMGs ever made, really wish they still made them just because they look so damn cool.

[@Metikoi]

He gets to the "and how does it do that?" with the velocity switch and I immediately go "Kraut space magic!" at the screen.

[@Tankliker]

I think the spring loaded stock is also really nice if you have gloves on

[@MrHws5mp]

As are the big push-buttons rather than fiddley switches,

[@LoanwordEggcorn]

@@MrHws5mp The whole thing looks like it was designed to be used with gloves on: for example huge buttons and levers.

[@biggestbarra]

@@LoanwordEggcorn and lots of space in the trigger guard

[@tobyndavis4710]

Hk is literally the hipster of the gun world, first striker fired pistol, first polymer pistol, first accessory rail, first to use polygonal rifling in a pistol, first to use a under the hand guard suppressor , first to use p-cap aka the brainchild behind M-lok and the list could go on. To be honest I’ve never even heard of this Sub gun another great video from Forgotten weapons.

[@joshuabrown7815]

That velocity lowering device is genius. I can’t believe something similar hasn’t made its way to the AR-15 market

[@DeHerg]

Probably because, if you reduce the speed of a 5,56 bullet down to subsonic level, you might as well use a slingshot with the amount of energy you have left.

[@shred1894]

@@DeHerg Do it for 300blk setups then. No need to label mags as subs or supers when you have a switch to make them all subs when you want to.

[@Maxwell-ty3bf]

@@shred1894yeah why label my magazines when I can have an extra complicated mechanism that is prone to failure instead

[@shred1894]

@@Maxwell-ty3bf because a gas port feeding into a ball valve is so complicated

[@singami465]

Someone should not only put the SMG1 in a retro-futuristic game, but change the range knob into a 30-round spinning ammo counter.

[@bluecaptainIT]

Noted.

[@houledea1073]

sounds familiar...

[@apathtrampledbydeer8446]

I have to say I really love the designs!!! Kind of looks like tandem pistol grips,two guns forming the beast with two backs!!!

[@lambda-m1676]

the 8x22 compact variant really completes this. very steady and i like the three burst. works well in indoor areas too

[@JamesLaserpimpWalsh]

Getting a contract to supply stuff to the US military must be like winning the lottery. It was sure worth them knocking up a couple of prototypes.

[@LoanwordEggcorn]

The prototype contract includes some funds for developing the prototypes too.

[@chrisbrinzo]

HK makes me feel things I didn't know were possible to feel for guns.

[@ayebraine]

When I first saw it on TFB, I was floored by the design. It looks like a work of a genius production designer or concept artist who was tasked with creating a gun that's futuristic but grounded, peppered with familiar details (M16 forward assist? UZI cocking handle? trendy MP5 aesthetics?) but is thoroughly "cool" and striking, space age the way of the _Alien_ 80s. The integrity of the design style is stunning.

[@HappyKatanaGaming]

Great. More Kraut space magic 🇩🇪💥

[@MeatVision]

That's the most beautiful SMG I've ever seen ❤

[@rotwang2000]

I recall magazines running articles announcing the new "replacement for MP5" the new gun for the 21st century ... And then nothing else, so nice to see the history and follow-up, not that there was much of a follow up aside from the UMP.

[@wendigo1619]

I always liked SMGs with forward pistol grips, in JTF2 we used so many different SMGs, we even used outdated models once or twice in training which i enjoyed

[@uazfoursixnine]

I first saw this gun in the "Project I.G.I. 2" game. Took a lot of research for me to find out, that it wasn't made up. Great video

[@Sen_Kanashimi]

SMG II: Electric boogaloo

[@Anvilshock]

Pneumatic, really.

[@csernobillahun]

Navy: We are looking for something better than the MP5 Me: You want the impossible

[@TragicTester034]

*SIG* *MPX* *HAS* *ENTERED* *THE* *CHAT*

[@clintcannon1902]

I didn't know that I cared about experimental sub machine guns, yet I watched in entirety and was entertained thoroughly. You're a sneaky guy, Gun Jesus.

[@thepjup4507]

god damn the machining on these is just next level. like a piece of art

[@Calvin_Coolage]

I never realized these were made at the US Navy's request. I always thought they were some weird design HK threw together to try and iterate on the MP5.

[@Mrgunsngear]

great info

[@podunk9798]

One of the coolest smgs I have ever seen. Thank you for what you do.

[@streamylc]

that velocity adjustment device is amazing.... gotta wonder about the effects of residue buildup though; especially running a suppressor.

[@verisperrulaias2999]

what a great way to start the day. for some reason im thinkin bout the folgers coffee commercial but with bullets in my cup

[@BenzionMenashe]

Great video! super interesting learning about the missing link between the MP5 and UMP :D

[@davidcolter]

Kraut Stealth Magic. That pressure reduction chamber is one of the coolest things I have seen on this channel.

[@k.r.baylor8825]

I like those two big magazine release/bolt hold-open buttons. Finally, buttons that are functional for people with big hands. I wish more firearms had these big buttons. They remind me of my mid-80s BMW dash buttons.

[@martingray165]

So you're telling me that they designed a gun...with speed holes?

[@martinstrumpfer1620]

Who doesn't like engineering prototypes? I guess the artisans having to remake the parts after the engineers inevitably mess up initially and need modifications.

[@stallen1066]

Always a treat to view your posts. Living vicariously.

[@terrywarner8657]

Thank you Ian, I learned something new today about managing gas pressures. I can't think of any other firearm that vents into a reservoir that outgases behind the bullet.

[@HybridPhoenix08]

"Uh-oh. The enemy is at 25m and my sights are set to 50m. Let me adjust that real quick..."

[@SpeedVaultz]

Guy 1: "So fam, what do you want to call this new SMG?" Guy 2: "SMG"

[@danmeyer2737]

Most aesthetically pleasing HK I have ever seen, that bolt release was so satisfying.

[@fleetof1337]

This was a perfect technical video showing development!

[@MostlyPennyCat]

H&K: "Here's the new submachinegun you wanted, the one that's not an MP5" Navy: "You just glued bits to an MP5" H&K: "Nope, totally new!"

[@hacknwack4065]

remember our promise ahh gun

[@leokafig5354]

This Video is a perfekt example why I love this channel. I wonder if or how well it works.

[@willlowery84]

Man I wish someone would make an upgrade for modern sub guns like the CZ Scorpion with that Hi/Lo switch system. That would be heckin’ rad!

[@Seelenschmiede]

Oh my, holy mother! That would be SO dope!

[@davesimmons8640]

"Who doesn't love experimental prototypes?" - Wish I had a nickel for every time I've said that.

[@Kungfujoe1110]

When I die, I'd like to be cremated, and I'd like my ashes to be scattered in H&K's Grey Room. I'm pretty confident this is entirely impossible, but a guy can dream

[@Wetcorps]

Well it is grey so it won't show too much.

[@Flociety]

That changeable velocity switch is really clever for shooting suppressed. Surprised that really hasn't become a thing.

[@anthonysmalawipredators8794]

That little spring on the inside of the stock is sparking so many DIY project ideas lol

[@tomdixon7264]

Economy and sport mode for your ammo, and they're working on a turbo setting.

[@s.mendoza5705]

*Ian calls H&K* "Hi H&K, this is Ian" H&K- "Hello, Ian, this is H&K" Ian- "hey what's going on? Hey umm...you think I can come over and play with a couple of your SMG's , take em apart, maybe make a video showing their insides?" H&K- 😨"...ok "😢💔

[@robintst]

Ian just likes H&K as a friend? lol

[@marianomaimone8870]

Those looks so cool!! I want one or fifteen each!

[@kamikazemelon787]

I realllly like the look of this SMG, something about a fully shrouded barrel and that squared off aesthetic hits me right