Desert Tech 5.56 MDR - Ammo Torture Test

Let's torture test the 5.56 version of the Desert Tech MDR with a wide variety of ammunition: steel cased, lacquered, quality and craptastic.
Federal XM193
Black Hills 50 grain V-max
Silver Bear 55 grain
Brown Bear 55 grain
TulAmmo 55 grain
TulAmmo 75 gain
M855A1
InRange is entirely viewer supported:
/ inrangetv

[@Tobascodagama]

Rifle: *exists* InRange fans: PUT MUD ON IT

[@uglyandcrazy6169]

5:43 "Rapid Concession?!" Is that like...when you need to get food at a sporting event VERY fast?

[@downhillchris2809]

Which is always.

[@dfwai7589]

That's when you start just handing people food

[@NormacTheViking]

Rickyisms

[@junkersintutus4282]

Alternatively it's when someone caves very soon after negotiations begin.

[@lovecraftcat]

Gas setting norminal

[@deusimperator7692]

I've also had problems with the 75gr Tula short stroking in my AR-15.

[@TwilightsChapter13]

@@john-paulsilke893 Carbine gas systems are relatively overgassed compared to standard rifle length and midlength systems, which would explain why it may work with your gun but not others.

[@tobiasactually]

Smörgåsbord = a type of Scandinavian meal, originating in Sweden, served buffet-style with multiple hot and cold dishes of various foods on a table.

[@mountainhobo]

It just means buffet.

[@Sableagle]

@@mountainhobo It means "buttered bread table," really. Well, "butter-lump(-implicitly-on-bread-because-nobody-just-eats-butter-off-the-spoon)-table." A buffet is just the piece of furniture, from a French word for a bench, stool or sideboard. We used to have a sort of firmly-stuffed leather cube for use as a seat, and it was called a buffet, pronounced "buff it." I don't think anyone uses those or calls them than any more, though. The "buff-fé" is the sideboard, the table along the side of the room. You could call that meal a Smörgåsbufet, if you wanted to.

[@mountainhobo]

@Sableagle -- The point is, it was a style of serving, not a meal, unless you eat a table at regular intervals.

[@jubuttib]

@@mountainhobo At least in my experience it has been kind of both, as in it's specifically a buffet style serving of sandwiches (the "open" kind, with bread only on the bottom), basically just a table full of bread, butter and toppings you can use to build sandwiches. I think it was only last year that I heard anyone use smörgåsbord for something that wasn't specifically a sandwich buffet, and they were from an English speaking country.

[@GTSYankee]

It's nice to see you not abhor a bullpup.

[@mikeblair2594]

Grey ham- any more.

[@quadg5296]

now he is used to it, it even looks like he likes the ease of loading a fresh mag. :) which was something him and Ian used to complain about.

[@farstox4656]

The MDR was announced when I was starting preschool, so glad it finally came out in time for me to spend my Social Security money on it!

[@BeKindToBirds]

How young are you that a 4 year development cycle for an *entirely new firearm* makes you post this.

[@farstox4656]

@@BeKindToBirds I am 12.

[@luissantiago5163]

Love the MDR vids. Makes me want a bullpup really bad.

[@Benson_aka_devils_advocate_88]

InRange: We're going to do a torture test. IraqVet8888: Hold my fire extinguisher...

[@TheGM-20XX]

this was more like an interrogation.

[@rayfeltz8477]

Starting to want a bullpup now. Pretty much the only one on the radar is the MDR because A your vids and B the caliber conversion. Covenant won’t know what hit em.

[@anotherrandomtexan25]

@Mike Griffith Masaki ssshhhhh that's supposed to be a secret! Can't let them damn aliens know we're already getting ready!

[@ThickestKYLE]

@Mike Griffith Masaki Misriah*

[@larryh502]

I don't hold that hiccup with the Tulammo against the MDR-Tulammo is absolute craptastic steaming pile of shit ammo. I had the cases get stuck in my Colt AR several years ago when all other ammo including Wolf steel case ran just fine. Tulammo sucks!

[@JesusvonNazaret]

i'm still very pleased in how they handled the ammo issue on the .308 version.

[@kylejones2318]

@@paulparadis66 Who hurt you?

[@mkultraification]

Paul Paradis The gas issues were because nato spec ammo is lower pressure than commercial .308. It's almost like you don't understand how guns work but insist on being an arrogant ass anyway.

[@JesusvonNazaret]

@@paulparadis66 you are such a pleasant person

[@Jaguarboy11]

@@paulparadis66 lol wtf

[@talltale9760]

Paul Paradis what

[@beechfox3423]

I’ve been shooting steel case forever and I had absolutely no idea Tula made a 75gr.

[@tugboatyan]

Karl and Ian talk about it briefly during their gear conclusions video for Hard as Hell 2 Gun 2017 at around the 26m 30s mark - both found it to be a touch better than 55gr Tula in terms of reliability and accuracy. Out of a 16" barrel, I've clocked 75gr Tula at 2428 average fps, and anecdotally I'm inclined to agree with them that 75gr Tula is about the best when it comes to the ammo available for about 20-30 cents per round.

[@LUR1FAX]

I believe Tula 75gr is what they used mostly for their WWSD rifles.

[@nerdlydood]

my BCM lightweight upper won't shoot their 62gr HP for shit, i get 5-6 inch groups (all in a vertical line, weirdly) - haven't tried the 55gr - but that 75gr stuff shoots like 1.5-2 MOA

[@thephantomzoneboxing]

@@randymagnum143 been discontinued..LEO only

[@thephantomzoneboxing]

@@randymagnum143 thats actually pretty good i never got the phenomenom of paper shooters and their groups..my only concern is when i shoot does it go bang everytime and will the bullet go in the general direction im aiming!

[@AmbGun]

A 308 MDR will be featured in our forthcoming video series, Ambidextral Gunfighter. Desert Tech understands the ambi advantage and the importance of perfect mirroring of controls. Impressive rifle from flash hider to recoil pad....both in design and quality of build. www.ambgun.com

[@commandZee]

Ian and Russel couldn't come out in some short-shorts for this one?

[@bigricksmith8345]

Honestly, it bothers me when more expensive firearms are ammo sensitive. After a certain price point, it better work with most ammo or it's not worth my time. My M9A1 Berretta for example, can and has been flawless with any ammo I've tried. In that regard, it's worth every penny to me.

[@bigricksmith8345]

@@PureCountryof91 In my opinion. Any 1000$ gun should be capable of that or better.😁 Glad it works well for you, though. I've always wanted one.

[@damarei]

It's a machine you dork. A Ferrari will not run well with cheap unleaded gas

[@loganholmberg2295]

I think this gun is cool. Id probably use it in 5.56 but I think I would get the 308 barrel to incase I wanted to shoot some 308 in it. Not a fan of owning a lot of guns but this seems like a good gun to toy around with and get geeky with two calibres. I know the AR platform has way more options but I prefer the way a pull pup feels myself in those that I've shot. It just fits my body type better IMO. Also I like having something different from everyone else. lol.

[@stealthtallyfox7210]

Cool video about the MDR, would love to see more about it down the road. But what about that M27 IAR video?

[@FearlessLeader2001]

God damn that M855A1 kicks a lot. First time I've seen it fired ever, and it was with a comparison to a smorgasbord or different rounds. Proud of Desert Tech for making such a reliable gun as well.

[@danieljcall3811]

Now I'm curious if will digest inceptor srr ammo being a 35gr cqb steel safe ammo. For what little I've used it seemed a little warmer than m193 in recoil impulse.

[@josiahricafrente585]

You can kinda hear the difference in volume between your other rounds, and those high-powered military rounds.

[@shanesizemore3654]

I wish more channels do ammo tests similar to these. I run 855 but when I'm just going to shoot for cheap fun I like cheap steel case and some guns just won't run it. Keep up the good work

[@NotOneOfUs]

Did you accidentally call the Tula ammo Wolf? That is so mean. Apologize to Tula, Karl.

[@lucasblanchard47]

Gosh I love the look of that rifle! Wish I could afford to get a .556 version for myself!

[@MrShtbrick]

I don't like bullpups and I wish I didn't like this MDR, but I think I do.

[@USSEnterpriseA1701]

Well you're a braver man than I am, you couldn't pay me to put M855A1 in any of my 5.56 rifles. I prefer the 77 grn. heavy stuff as my standard loading in the rifles that have the twist for it, a bit pricey and sometimes a pain to find locally, but I've had good luck with my rifles liking it (and it doesn't drag a magnet, important for target practice at my local range).

[@m2hmghb]

You had too much fun with trying to screw this poor rifle up! Good job!

[@yop_cholo]

That last mag made me feel dirty.

[@lightningslim]

That mound of dirt should have surrendered after the first magazine! 😉

[@mw4222]

Interesting results. I feel like the higher reliability might have been caused by the 556 version having more rearward space for the BCG to travel (due to the same receiver also having to accommodate 308) and it is safe to overgas the gun a bit without the bolt slamming into the back of the receiver. Extra space may have also provided the ejection mechanism enough time to actuate.

[@Isaak0700]

I wonder if the m855a1 has the same issue with the desert tech, as in it destroys the chamber faster like it does on m-4's and m-16's.

[@nicknewman1924]

Ok karl now we need a basic accuracy test out to say 400 m . Sight in .

[@kainhall]

i think because 556/223 is mostly used in semi-auto rifles..... companies have all settled right around ASME and/or mill spec if your ammo doesnt work in an ar-15..... 1000s!!!! of people will hear about it, from just one guy! however..... 308 being used mostly in bolt actions... especially on the normal Joe civilian market...... ya get a wider range of pressures bolt actions could give a fuck less about pressure..... right up till it blows the gun apart (or hard extraction) if the bullet exits the muzzle at 20fps on a bolt gun..... it doesnt short stroke and jam up....

[@KaletheQuick]

Oooh, M855a1! A literal war crime of a round. Nice.

[@rtallsky]

Superb overview as usual! More on the MDRX/WVERN please.

[@stibbbs]

I understand you casually mention in the beginning of the video the gun is caliber "5.56", but you never expressly state what specific caliber the barrel is rated for. This is a consideration as your test ammunition appears to be caliber .223, with the exception of the M855A1. Why no substantial test with SS109 or M855? Especially if this firearm is designed with future military applications in mind. Are there markings stamped on the barrel with rate of twist and caliber?

[@ryang8040]

you can't shoot steel case out of the mdr? why not?

[@junkersintutus4282]

Cause FUDD

[@MrShuffnagle]

So was the 5.56 ammo already loaded into the magazines at the beginning of the video? And is it problematic that the gun was smoking so soon after firing?

[@michaeldemetriou1399]

That bull pup is working good in 5.56 the 7.62 couldn't run that type of mix on a single gas setting.

[@Drew_Thompson]

This platform is a huge mess. It was revealed when 2015? It's still in beta.

[@jonathanschubert9052]

Of it'll run silver bear it'll run any normally available ammo. I had terrible problems with understanding in my @R

[@lowtdave]

That a1 ammo is basically gold at the time I'm posting this. You can sell it on gunbroker for all the money. And he just blasts it into the ground. :) That is high roller status there.

[@KR-bn4bg]

I don't like haters and trolls so please take this just as constructive criticism and for future reference for anyone else who reads this. When testing lighter loads like this for reliability, make sure to use full mags. The extra tension from the magazine spring slightly retards the energy in the action and can cause issues that might not otherwise be seen with mags only loaded 10-15.

[@KAD36Max]

Been waiting for this video. I have been keeping an eye out for this rifle but none of my local ranges have one to rent. And I really wanted see a good 5.56 test before I went and blind bought one. Keep up the good work In Range. When is the mud test?

[@bills6093]

I thought steel cased ammo problems generally involved firing a lot of steel cased ammo, followed by brass cased ammo. The idea being that the steel cases do not expand and seal as well and cause the chamber to get dirtier than normal. The following brass cases do expand, and can then get stuck in the dirtier than usual chamber. To get the problem to show up, you generally need to fire more than a few steel cased rounds?

[@Wolfstanus]

Most manufactures tell you to not use steel cased ammo in their firearms

[@JoeyJoJoJoestarJuniorShabadoo]

ah, the Mesignated Darksman Rifle.

[@rozzay1]

Anyone know the brand of shooting glasses Karl is wearing in this vid?

[@UnforgivingDemon]

Where does one buy M855A1?

[@bazookawarren]

I knew it was only a matter of time before you guys came out of the bullpup closet!

[@InrangeTv]

I still don’t recommend them.

[@TheShorterboy]

I think the hill is dead, just saying

[@elktrip2000]

Do you think you will ever do a mud test on the 556 MDT

[@michaelboyle9889]

Looks like a awesome little rifle 🔫👍

[@Jean-Pierre-Deau]

Could someone explain to me why steel cased ammunition is a problem? Or Maybe refer to somewhere I could read about it?

[@hardwire1013]

John it doesn’t expand the same as brass ammunition

[@RobinRobertsesq]

It's coated to keep cases from sticking in chamber

[@junkersintutus4282]

Cause FUDD

[@j.sagiechode]

It costs how much and is a POS in 308! I dont think so!

[@elwismorgan1230]

Is it just me or do the mags stick out really far? Like the distance from the top of the receiver to the bottom of the mag seems excessive?

[@marzcapone9939]

Had at least one 40 round mag on the table...

[@elwismorgan1230]

@@marzcapone9939 I know, think its the first mag that's what caught my eye in the first place but even the 30's seem to.

[@tunabreath11]

@@elwismorgan1230 The gas system/recoil spring/guide run above the bolt through the receiver/stock, then the sight platform is above that. That puts the bolt/barrel line (and mag) lower in the receiver compared to an AR. Most new bullpups are like this. Conventional piston guns usually aren't though since they can just raise the sight platform to accommodate the piston because the action doesn't have to run all the way through the stock like a bullpup.

[@elwismorgan1230]

@@tunabreath11 That does make sense, the Tavor appears to be the same way. I was more comparing it to a Steyr Aug in which the recoil spring etc are below or the same level as the bolt and barrel with raised sights. I do wonder if its worth the extra receiver height just for slightly less recoil though, especially in 5.56.

[@LinkHyrule03]

@@elwismorgan1230 40's look weird in bullpups. I personally use 20rd mags in any bullpup I plan to go prone with. 20 rounders just work better with the ergonomics. 30's are typical but they stick out beyond the pistol grip and make it so you can't really mono-pod on the pistol grip.

[@SchmittPlaythroughFR]

Hope you make a series out of this!

[@PaletoB]

Mmmm smörgåsbord!

[@MrGiXxEr]

Now, how do the feed ramps look after running the m855a1?

[@petesheppard1709]

Nice video! The M855A1 was a nice feature. The problem steel case has caused for me has been stuck cases, apparently due to carbon fouling. Cleaning the chamber corrected the problem in both my S$W Sport II and my Kel-Tec SU16.

[@bigbill2444]

It's my understanding that the stuck steel cases are from the varnish melting in the hot chamber.

[@xt6wagon]

One video showed a rdb where the varnish glued the case into the chamber. Cheap brass case is cheap enough to avoid it in guns with poor chamber access

[@petesheppard1709]

That's been the general understanding, but I've seen videos by Military Arms Channel and A Regular Guy that indicated (to my satisfaction, at least) that the real problem is carbon fouling, allowed by the less ductile steel cases. Whatever the cause actually is, diligent chamber cleaning controls the problem, IF you shoot steel-cased ammo.

[@samkite8028]

I have a 400$ psa ar15, that i literally shoot mixed 223/556 through with 0 problems

[@il2838]

Does it have a full-auto version?I'm curious how good does the ejection system work in full-auto condition.

[@dadsausmchero]

Dumb guy question, what is flying out of the ejection port when you close the bolt on a "new" mag of ammo?

[@Evarakeus]

The casing for the last round. The panel on the ejection port holds the casing in place until the next round is fired and it's casing pushes the old one out of the way

[@kalebcathey7397]

Are y’all going to mud test the mdr ? If y’all do can y’all do the 308

[@Wastelander009]

I'm glad it worked well. I'd be interested in figuring out just what makes the .308 version more temperamental with the steal cased ammo.

[@actionhirvimoose4294]

Most likely friction. I'd like to imagine that the steel case is much more rough than the brass case.

[@regisphilbinsscrotum6631]

Mdr in .308 has a bolt gun tight chamber so it is sensitive to tolerance and oal. Helps make it accurate but it does need quality ammo. Mine loves lake city

[@Wastelander009]

If it has to do with friction then is it possible to have a self adjusting gas system which provided more or less pressure against the bolt depending on the position of the bolt? I'm new this stuff maybe I'm talking nonsense.

[@mkultraification]

Brass cases expand on firing, then bounce back away from the chamber walls a bit. Steel cases expand and stay that way. This creates a lot of friction. 308 is a high pressure cartridge. It runs around 15,000 psi more than 5.56. The case also has more surface area. When steel .308 cases get stuck in the chamber, they really get stuck. You'll find stories and pictures of guns "blown up" by steel case 308. I've witnessed a couple. The guns don't actually blow up. What really happens is that the case gets stuck partway out of the chamber during cycling and the head is torn off, releasing pressure into the action. This blows the magazine out, and damages stocks, but the gun is usually intact. The hk91 and clones have fluted chambers, which bleed gas pressure around the case and break the adhesion. This mitigates the problem. It also helps that the blowback system uses the case as a sort of gas piston, which means that the extractor isn't pulling on the case head and doesn't rip it off.

[@regisphilbinsscrotum6631]

@@Wastelander009 not really, it needs a high bolt velocity to operate the ejection mechanism

[@vg4288]

Does the MDR take its own proprietary mags or does it take M16 mags ?

[@gamelord1000]

standard Pmags

[@ryanhill5676]

Just do a mud test already

[@Bushy_P]

Is Desert Tech owned by the Kingston Clan?

[@DefZen343]

Did the M855a1 Damage the Feed ramps with that steel nose? 😯😯😯 Mdr Barrels are probably not cheap 😯😯😯

[@echofoxtrotwhiskey1595]

DefZen343 If you use a gen 3 pmag it aligns the bullet nose with the chamber to avoid that issue.

[@junkersintutus4282]

@@echofoxtrotwhiskey1595 In an AR-15 or an MDR?

[@chetterbomb]

Such a cool rifle system. I love watching it spit out the case when the bolt release is pushed.

[@george2113]

Thank you Karl

[@nozzerjuice]

Hi

[@Brezzy_5000]

Would love to see the rest if my WiFi didn't die at this point in time

[@Ducaso]

I honestly did not know tula made a 75 grain till just now lol

[@PureRushXevus]

No views, comments or likes / dislikes.. must be early

[@ChucksSEADnDEAD]

Last time I was this early I didn't know Desert Tech was ran by cultists involved with child abuse and welfare fraud.

[@ChucksSEADnDEAD]

@@clearly_2967 www.reddit.com/r/longrange/comments/6vmquf/desert_tech_ownership_warning/ www.splcenter.org/fighting-hate/intelligence-report/2017/blood-cult www.vice.com/en_us/article/gyxbvb/im-a-person-and-i-deserve-more-what-its-like-to-escape-a-polygamous-cult

[@robertreynolds6057]

Ok I have a question. When he let's the bolt go forward it seems to kick a casing out every time. Is that a spent shell or a live round? And why?

[@gwtpictgwtpict4214]

Spent shell. It's explained in the first videos on the rifle but basically you can quickly swap from from right side to left side ejection and as part of that when the spent shell is extracted from the breech it sits in the ejection mechanism and is only thrown out when the bolt goes forward.

[@TheJBerg]

Spent casing. The rifle ejects upon bolt close, not bolt open.

[@BFisherMKE]

If I've ever had a malfunction with steel case, it is always a short stroke.

[@ph5832]

You should get a percentage of sales for the next couple of weeks ....

[@donut3110]

We need a 6.5 Grendel conversion with a chrome lined barrel Great rifle in 5.56 though, seems to be flawless +/- a gas setting which can apply to every rifle, ever

[@stilllife8]

What makes steel cased ammo not work in the .308 configuration?

[@LinkHyrule03]

.308 is pickier and harder to get to run reliably. There are a ton of technical nitty gritty reasons for that, if you really want me to explain. But be warned, it'd be a wall of text.

[@stilllife8]

Wall of text wall of text wall of text!

[@LinkHyrule03]

​@@stilllife8 Oh boy here we go. Simply put the .308 had problems that the .223 doesn't suffer from. Reasons .308 has problems: 1) In general, due to the greater power involved, the higher pressures, the increased length of extraction needed, the higher pressures involved, and the size of the cartridge, .308 in general takes more effort and engineering to cycle properly. There's a reason that even cheap AR-15's in .223 run reliably while it takes some serious effort and money to get a .308 AR to run reliably. And the ones that do run reliably are generally built SUPER tough and then over gassed. The SCAR is notably overgassed, and is known to wreck optics. 2) In the MDR, this gets exacerbated by the MDR's need for more gas than normal. Why does it need more gas? Because of the points below. 3) Due to the stiffness and design of the pall in the ejection chute that holds the cartridge, the scissor ejection mechanism must be actuated with gusto, with some serious umph. If the scissor mechanism doesn't get enough umph, it will fail to clip the cartridge into the pall that holds the cartridge in the ejection chute. 4) The scissor ejection mechanism is operated near the end of the stroke. Almost every other gun ejects the cartridge soon after extraction, flicks it out, and then has a healthy dose of bolt over-travel with which to extend the recoil impulse and reduce shock. That helps them run far more reliably with different loads, as the extra umph from more powerful loads just goes into a little more bolt over-travel. But with an MDR, like a Kel Tec KSG, almost all of the important things in an MDR happen near the end of the travel of the action. And then it just stops. So you don't get the grace of the bolt over-travel and you NEED lots of umph at the end of the bolt travel. 5) Because of those reasons, the MDR has to have the bolt flying backward with plenty of energy when the scissor mechanism is actuated. In order to get that level of energy out of the bolt when it actuates the scissor mechanism, the bolt velocity must be notably higher than normal. That means it has to be notably overgassed compared to conventional .308 rifles. 6) Because it needs to be overgassed, it really relies on full power ammo. Most steel case ammo is notably weaker than normal. Thus, steel would short-stroke the action. But when a normal rifle short strokes, it might rechamber the empty cartridge, maybe double feed, or just stovepipe. When the MDR's scissor mechanism doesn't get enough umph (like from a low powered steel case round), it pushes the cartridge across the bolt face, and towards the pall in the ejection chute. But it doesn't have enough umph to clip the cartridge into the pall, which is supposed to hold it in place. So the cartridge, no longer held by the bolt, but also not held by the ejection chute pall, is just kinda loose inside the action, kinda off to the side of the bolt. This will obviously cause a malfunction. This is also why removing the side panel removes that issue. The scissor still works properly, but it no longer needs that much umph to get it into the pall. The ejection chute system really does require quite a bit more gas in order to function properly. 7) The sad part is that early .308 MDR's were so overgassed to solve this issue (so that they COULD cycle low powered steel ammo) that they had such a violent bolt velocity that they would shear through brass rims if the brass wasn't strong enough. And consequently, they also beat themselves up. 8) The short stroke piston gets knocked backward a very short distance and inertia needs to carry it the rest of the way. But the distance and time over which the piston is receiving energy is very small, thus its acceleration backwards is very violent. 9) Because Desert Tech needed the design to accommodate both .308 AND .223 (and allow the gun to have left-right swappable ejection, to boot), the extractor is somewhat smaller than is normal for a .308 semi-auto rifle. Due to a smaller than normal extractor (which has since been rectified in .308), old MDR's had less surface area with which the extractor would contact the rim. 10) The dwell time on the .308 MDR is quite short compared to what .308 normally gets. As such, pressure is still quite high as it tries to extract the cartridge. So what does .223 do differently? 1) .223 semi-autos in general, including AR's, are just SO much easier to get to run reliably. It really is quite easy. Possibly due to a shorter case, the scissor mechanism can be actuated sooner, but I haven't measured mine. 2) .223 needs WAY less gas in order to cycle the action. It's also lower pressure and less powerful. 3) The pall stiffness problem seems to have been worked out with .223. 4) With .223, you can happily have a smoother bolt acceleration and still have enough energy to hit that scissor mechanism with gusto. 5) Again, .223 needs less gas and is lower pressure than .308. 6) .223 steel is also weaker, but it seems that the difference between full-power .223 and steel .223 isn't as large as the difference between full-power .308 and steel .308. 7) See the above reasons. Also, .223 is far less abusive to guns than .308 is. 8) Compared to other .223 rifles, the .223 extractor is on par with or even a little larger in size, solving the extractor engagement issue. 9) The dwell time for the .223 MDR is pretty normal for a .223 rifle. All of these reasons add up so that the .223 MDR really doesn't have the worst problems that the .308 MDR had. Further, the .223 MDR has benefited from all of the rolling changes made over the course of 2-3 years, in which they were ironing out and improving the .308 MDR. The .223 MDR gets to start life with all those improvements, which are huge. If you want a wall of text for all the rolling changes made to the .308 MDR, just ask.

[@LinkHyrule03]

You asked for wall of text, so I'll just assume you want to know the changes. I had a huge write up about all the rolling changes, but I can't find it now. I guess I'll have to recompile it later. This is just off the top of my head for now, so I might miss some things or have some details wrong: 1) There have been at least two changes to the handguard. First, they supposedly improved the quality of the polymer to avoid breakage issues. Then they implemented the hole in the side to access the gas valve. 2) The gas valve has seen at least three changes. Relatively early on, they implemented a cut in the gas valve so you could adjust it with a screwdriver from the front. Then there's the 2018 gas valve and finally the 2019 gas valve. So there are four generations: Initial release, improved, 2018, and 2019. 3) The extractor has had two updates I think. The first was a QC improvement, and the second was widening it. 4) The barrel, barrel extension, and chamber process was revised. Something about bad chambers early on. 5) They have supposedly done work to lighten up the magazine releases. While this wasn't a documented rolling change, I have heard multiple new users report that their magazine releases are lighter, so I presume they changed something. 6) MDR's used to require a break-in period, with specific instructions. They changed some things and the break-in period is a thing of the past. 7) They've made material improvements across the board. I'd presume that the polymer of the lower was improved along with the handguard's polymer. One user reported having the charging handle dent/damage/gall the aluminum receiver at the point of impact on the forward stroke. I'd heard that this was corrected, presumably with better anodizing. 8) I think they made minor changes to the ejection chute, particularly the pall that holds the shell. Recent owners aren't saying it's as absurdly sharp and pointed as it was before. 9) The holes where the take-down pins go through were reinforced, solving the cracking problems when overgassed. I'd heard many different pins also got reinforced. 10) According to one Desert Tech employee regarding how tight the flashhiders used to be "we fired Hercules and got a torque wrench". While this is obviously humorous, I'd wager what he really meant is that they changed the amount of torque applied to the flashhiders. 11) My memory might be failing me, but I remember them changing something about the trigger group. I think it was the loop thing that the transfer bar linkage attaches to. 12) Many users used to report having MDR's with reciprocating charging handles. They aren't supposed to reciprocate. They changed something in there, such that I have yet to hear about this issue from any new units. 13) Better quality control across the board. Their QC has gotten better and better over the past 2 years. 14) Better customer service. They keep improving and getting better and better with customer service. This is just from memory and a good amount is just speculation based on people reporting problems, Desert Tech saying they fixed the problem, and then people not having problems after that. If you want specific technical data about the three different .308 gas valves and the measurements of their holes, here you go: Original 2017 gas valve for .308: S (Suppressed) - 0.030" N (Normal) - 0.041" A (Adverse) - 0.049" 2018 6-position gas valve for .308: 1 - 0.015" 2 - 0.026" 3 - 0.037" 4 - 0.041" (note that position 4 is the same as the original's N/Normal setting) 5 - 0.044" 6 - 0.049" (note that position 6 is the same as the original's A/Adverse setting) 2019 6-position gas valve for .308: 1 - 0.018" S - 0.029" (designated as S) 3 - 0.042" N - 0.049" (designated as N) 5 - 0.052" A - 0.055" (designated as A) I have not measured the .223 gas valve yet.

[@486kyle]

it blows up a lot of guns from case head failures

[@tonywallick1337]

Is that Ali G

[@Aham4u]

Any accuracy tests in the future with the MDR?

[@Khorsathedark]

That MDR is really nice. I don't know when it will be in my budget, but it is on the list to buy.

[@joe125ful]

Ammo torture?So freezing,smashing with hammer or....? So its all about bullet weight with same cal right?

[@Seelenschmiede]

different powderloads?

[@nathanboulton2066]

from purely an "outside view with no engineering quals" (yes i know!, who the hell am i know to say something!!) if their having problems with the 7.62 but not 5.56 would that not suggest a tolerance issue or something along those lines? i sincerely wish them all the best though its not easy to produce a new firearm to the market these days. and to InRange, thanks for doing what you do

[@bubba200874426]

I think that due to the larger case and bullet it allows a much larger absolute variance(while being the same range in terms of percentage) of performance. Since it's the same system, the larger variance in the .308 could cause problems the .223 doesn't have.

[@StuffedCrows]

Bullpup is the ultimate form of assault rifle, don't @ me.

[@InrangeTv]

You've clearly never tried to really use one for score.

[@StuffedCrows]

@@InrangeTv I'm glad you don't play gfl.

[@kenhelmers2603]

Nice! Thanks guys :)

[@blackhand1431]

Great, now throw it in the mud

[@kenibnanak5554]

Excellent.

[@mahartma]

Why is most of this ammo Vietnam era 55gr, I thought everyone has moved on to 62gr and 1:8 since the mid 80's

[@Sableagle]

Why would they do that? kzbin.info/www/bejne/fJ3Sfp-tZ9OHosU kzbin.info/www/bejne/pX68nHiDnbWmhZo

[@xt6wagon]

It's the cheapest out there, and plenty of 5.56 guns are still made in bad twist rates, not to mention older guns in absurd rates like 1 in 14

[@ColdCanuck50]

Some of those ammo boxes almost looked as old as me.

[@MyLonewolf25]

Any chance of m855a1 test on the armor plate?

[@InrangeTv]

M855A1: Russian Level Armor Penetration Testing kzbin.info/www/bejne/l5i6dYpon7mmkM0

[@jdo2574]

Lacquer rounds should have been shot last since as it heats it leaves lacquer in the gun. Any issues with other ammo after shooting lacquer my not be the other ammo but the lacquer left in from previous crud ammo. Just My opinion.

[@junkersintutus4282]

FUDD

[@alt5494]

Nice test.

[@keithplymale2374]

Always wanted a bull pup just because. If only I had the money I would get this one.

[@GiveMeThatCake]

Was there any issue with the feed ramps and 855A1?

[@486kyle]

rofl, after 7 rounds, eh?

[@GiveMeThatCake]

@@486kyle he may have shot more prior to making this video

[@AMX-30B]

666 likes hmmmm

[@ethanwilson7787]

Confirmed Carl is our lord and savior Satin himself

[@1320crusier]

isnt Desert Tech still vaporware?

[@Taprack13]

No steel case in .308 👎

[@shrimpanzy7627]

Silver bear is great for aks and mosins but not for anything else

[@Tinfoil_is_the_new_black]

Honestly I've really never had issues with the barnaul ammo, which is any of the "bears".

[@bigricksmith8345]

My M9 Beretta doesn't have issues with it, or really any ammo for that matter. Some firearms just run anything.

[@sextuspompeius1266]

5:06 that is satisfying