United States Army Special Operations Command (USASOC) Upper Receiver Group, Improved (URG-I) and Naval Special Warfare (NSW) Upper Receiver Group, Improved (URG-I)

This thread is for pictures of and discussion about issued URG-Is and clones. That doesn't include "inspired by" rifles, "my take on an URG-I" rifles, Geissele Duty rifles, Geissele Super Duty rifles, or anything else. Please post those pictures here, here, or here.

Parts list for issued USASOC URG-I and NSW URG-I rifles:

Lower Receiver Group

lower receiver- M4A1

receiver extension- standard M4/M4A1

action spring- standard M4/M4A1

buffer- H2

grip- standard M16A2/M16A3/M16A4/M4/M4A1

stock- Type I, Type IIA, Type IIB, Gen 1 SOPMOD

trigger- Geissele SSF- P/N 05-102

selector- Colt/Manufacturing Support Industries full auto ambi- P/N SP401017

USASOC 14.5" Upper Receiver Group, Improved- from conversion kit NSN 1005-01-671-3911

upper receiver- standard M4/M4A1

bolt carrier group- standard M16A4/M4/M4A1

charging handle- Geissele Airborne Charging Handle in Desert Dirt Color with subdued markings- P/N 05-664S- NSN 1005-01-672-4803

barrel- Daniel Defense 14.5" mid length "GOV" profile with .076" gas port- P/N 07-077-07308

gas block- Daniel Defense pinned gas block which only comes on their rifles and URGs or barrel assemblies. Not available separately.

gas tube- Daniel Defense mid length- P/N 04-013-18034

hand guard- Geissele 13.5" MK16 in Desert Dirt Color- P/N 05-650S- NSN 1005-01-672-4794 (MK16s with no markings, laser P/N markings, and stamped NSN markings have all been seen in pictures)

M-LOK rail section- 3 ea Magpul 7 slot aluminum- P/N MAG582-BLK

M-LOK sling mount- Magpul QD- P/N MAG606-BLK

muzzle device- SureFire 4 prong flash hider- P/N FH556RC

suppressor- SureFire SOCOM in Dark Earth- P/N SOCOM556-RC

rear BUIS- Matech

front BUIS- Knight's Armament Front Flip Sight in Taupe P/N 99051

NSW 14.5" Upper Receiver Group, Improved- from conversion kit NSN 1005-01-671-3911

upper receiver- standard M4/M4A1

bolt carrier group- standard M16A4/M4/M4A1

charging handle- Geissele Airborne Charging Handle in Desert Dirt Color with subdued markings- P/N 05-664S- NSN 1005-01-672-4803

barrel- Daniel Defense 14.5" mid length "GOV" profile with .076" gas port- P/N 07-077-07308

gas block- Daniel Defense pinned gas block which only comes on their rifles and URGs or barrel assemblies. Not available separately.

gas tube- Daniel Defense mid length- P/N 04-013-18034

hand guard- Geissele 13.5" MK16 in Desert Dirt Color- P/N 05-650S- NSN 1005-01-672-4794 (MK16s with no markings, laser P/N markings, and stamped NSN markings have all been seen in pictures)

M-LOK rail section- 2 ea Magpul 7 slot aluminum- P/N MAG582-BLK

M-LOK light switch mount- Magpul Tape Switch Mountig Plate- P/N MAG631

M-LOK rail covers- 2 sets Geissele Rail Panel, Desert Dirt Color- P/N 04-428S

M-LOK sling mount- Magpul Paraclip- P/N MAG607-BLK

muzzle device- SureFire 4 prong flash hider- P/N FH556RC

suppressor- SureFire SOCOM in Dark Earth- P/N SOCOM556-RC

rear BUIS- Matech

front BUIS- Knight's Armament Front Flip Sight in Taupe P/N 99051

USASOC 11.5" Upper Receiver Group, Improved- from conversion kit NSN 1005-01-684-1906

upper receiver- standard M4/M4A1

bolt carrier group- standard M16A4/M4/M4A1

charging handle- Geissele Airborne Charging Handle in Desert Dirt Color with subdued markings- P/N 05-664S- NSN 1005-01-672-4803

barrel- Daniel Defense 11.5" "GOV" profile- P/N 07-077-07108

gas block- Daniel Defense pinned gas block which only comes on their rifles and URGs or barrel assemblies. Not available separately.

gas tube- Daniel Defense carbine length- P/N 04-013-01009

hand guard- Geissele 10.5" MK16 in Desert Dirt Color- P/N 05-1073S

M-LOK rail section- 3 ea Magpul 7 slot aluminum- P/N MAG582-BLK

sling mount- Magpul QD- P/N MAG606-BLK

muzzle device- SureFire 4 prong flash hider- P/N FH556RC

suppressor- SureFire SOCOM in Dark Earth- P/N SOCOM556-RC

rear BUIS- Matech

front BUIS- Knight's Armament Front Flip Sight in Taupe

NSW 11.5" Upper Receiver Group, Improved- from conversion kit NSN 1005-01-671-3911

upper receiver- standard M4/M4A1

bolt carrier group- standard M16A4/M4/M4A1

charging handle- Geissele Airborne Charging Handle in Desert Dirt Color with subdued markings- P/N 05-664S- NSN 1005-01-672-4803

barrel- Daniel Defense 11.5" "GOV" profile- P/N 07-077-07108

gas block- Daniel Defense pinned gas block which only comes on their rifles and URGs or barrel assemblies. Not available separately.

gas tube- Daniel Defense carbine length- P/N 04-013-01009

handguard- Geissele 10.5" Mk16 in Desert Dirt Color- P/N 05-1073S

M-LOK rail section- 2 ea Magpul 7 slot aluminum- P/N MAG582-BLK

M-LOK light switch mount- Magpul Tape Switch Mountig Plate- P/N MAG631

M-LOK rail covers- 2 sets Geissele Rail Panel, Desert Dirt Color- P/N 04-428S

M-LOK sling mount- Magpul Paraclip- P/N MAG607-BLK

muzzle device- SureFire 4 prong flash hider- P/N FH556RC

suppressor- SureFire SOCOM in Dark Earth- P/N SOCOM556-RC

rear BUIS- Matech

front BUIS- Knight's Armament Front Flip Sight in Taupe P/N 99051

10.3" Upper Receiver Group, Improved
NOT issued

Specs:

13.5" Mk16 mass- 419 g / 14.8 oz
14.5" barrel mass- 723g / 1 lb 8.1 oz
14.5" URG-I mass- 1.89kg / 4 lb 3 oz (14.5" RIS II URG with Govt profile barrel and same muzzle device is 2.00kg / 4 lb 7 oz)

10.5" Mk16 mass- 353 g / 12.5 oz
11.5" barrel mass - 620g / 1 lb 5.9 oz
11.5" barrel with gas block mass- 581g / 1 lb 4.5 oz
11.5" URG-I mass- 1.72kg / 3 lb 13 oz (10.3" RIS II URG with Govt profile barrel and same muzzle device is 1.71kg / 3 lb 12 oz)

9.3" Mk16 (not issued, only included for reference) mass- 335 g / 11.8 oz
10.3" barrel (not issued, only included for reference) mass - 525 g / 1 lb 2.5 oz
10.3" barrel with gas block (not issued, only included for reference) mass- 563 g / 1 lb 3.9 oz
10.3" URG-I (not issued, only included for reference) mass- 1.64kg / 3 lb 10 oz (10.3" RIS II URG with Govt profile barrel and same muzzle device is 1.71kg / 3 lb 12 oz)

Known upper receivers used on issued 14.5" URG-Is:
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Known BCGs used in 14.5" URG-Is:
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14.5" URG-I gas blocks:
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If you have any pictures that show issued upper receiver or BCG markings, please post them.

If you have any pictures of gas blocks on post testing issued URG-Is that are different, please post them.

That won't work either. the lpgb that comes with the 14.5 barrels is not the normal mk12 lpgb that they sell separately. the one that comes with the 14.5 barrel is smaller and skinnier versus the mk12 block.
You could go that route but it's not clone correct if your building a clone urg-i

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Good looking rifle.

Buy the stripped than get a MK12 gas block, then your correct.

MK12 gas blocks are not used on issued rifles.

What are used on the issued?

dd

My bad, for some reason I was thinking they used the DD MK12, then pinned them in house, since they build them in house.

I'll add that if anyone does use a MK12 GB, the bottom corners have very little clearance with the rail. (Geissele was using a chamfered MK12 for awhile to mitigate this issue. They eventually switched to the complete DD bbl assembly, which had the 'clone correct' DD LPGB. Now that you can purchase the MK16 rail and NSN ACH separately, there's no real advantage to the complete uppers.)

We've gone over this ad nauseum but Geissele has never sold a barrel or URG-I with the correct gas block. They went from Mk12 to modified Mk12 to the lower profile Geissele.

Pezbytate is correct. They never sold a complete upper with the correct issued dd gas block. I'm just getting around to getting an RMA for my DD Mk12 gas block to be chamfered by them, hopefully they don't mess up my 4 prong.

Looks like it turns into throwing good money after bad, buy once crye once, just no way to really make it correct later.  Anyhow, I had checked the OP for the barrel but it doesn't really state its is a non standard, non NSN until adoption part.   But, you're right, I think I just wouldn't be happy with it or if I had to sell it later down the line.

OP says:

barrel- Daniel Defense 14.5" mid length "GOV" profile with .076" gas port- P/N 07-077-07308

gas block- Daniel Defense pinned gas block which comes on their rifles and URGs

14.5" URG-I gas blocks:
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Google the part number

This.

1) Google that exact part number (P/N 07-077-07308)

2) Click the first three hits. I got primary arms, midway, and optics planet.

3) Sign up with your email for in stock notifications.

4) Order fast. Even before the plandemic, these were getting bought fast. Apparently there are way more cloners in this world than we think.

Did a little updating.  Would appreciate any feedback.

I would take off the CQD and change the gas port to .076".

Done

Hopefully this doesn't come across as me being an ass but that is absolutely incorrect. I have a complete clone upper from Geissele with the factory DD LPGB, not a MK12. It was one of the last clone uppers they built, if not the very last. I ordered it several months after they "hid" the web-page to order them. They went from being in-stock, to out-of-stock after I finished checkout. They took the page down completely a short time later.

Shit you got lucky with that URG-I. I purchased a complete clone upper during there 2019 July 4th sale and received the chamfered MK12 gas block.

You are the first I've heard of. Maybe the very last batch had DD gas blocks?

The correct barrel w/ low pro gas block just came back in stock on DD's site for anyone still looking since it's been the recent subject.

Too early for this?  https://www.iso-group.com/NSN/1240-01-681-3209

Just because we can't have it, doesn't mean we can't dream.

Sold out...

Well that was fast.

Thank you. I slipped the Mk16 over my Mk12 Mod1 SPR Muzzle to check clearance over the Badger gas block, to see exactly what you were talking about, the Mk16 sits about 0.05" lower than the KAC FFRAS

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Couple things
Stock-add Colt N1, Waffle
Front Sight-should read 99051
Rear BUIS-add KAC 300/600m sights

Remember the kit only had the Geissele Mk16 rail with barrel nut, Geissele Airborne Charging Handle, DD 14.5" mid length barrel, gas tube and gas block.  Everything else is off the M4A1 SOPMOD since 95'.



CD

@Theodoric

Great data sheet but I feel like you need to differentiate between the URG-I kit and the complete rifle. Your list blends the two and that could cause confusion for people new to cloning and the platform. The specific NSN you list is described as...

1005-01-671-3911MODIFICATION KIT,GUN,WEAPON

SPECIAL FEATURES

M4A1 UPPER RECEIVER GROUP KIT,CONVERTS THE UPPER RECEIVER OF A M4A1 TO AN IMPROVED BARREL AND RAIL ASSEMBLY.

KIT CONTAINS THE FOLLOWING ITEMS:
(1) 1EA, MID-LENGTH GAS SYSTEM 14.5 INCH COLD HAMMER FORGED BARREL, WITH TAPERED PIN GAS BLOCK P/N: 07-077-07308, 1EA.
(2) 14.5 MID-LENGTH GAS TUBE, P/N: 04-013-09401, 1 EA;
(3) GAS TUBE, PIN SPRING, P/N 15-028-04094,1 EA;
(4) CHARGING HANDLE (COYOTE), P/N: 05-664S, 1EA.
(5) M-LOK HANDGUARD COYOTE, MARK 16 13.5 INCH, P/N: 05-650S, 1EA.
6) M-LOK ALUMINUM RAIL SECTION, 7 SLOTS-BLACK, P/N: MAG582-BLK, 3EA.
(7) M-LOK QD SLING MOUNT BLACK, P/N: MAG606-BLK,1EA.

https://www.nsn-now.com/1005016713911

You could then further specify all the other parts based off CD's comment above.

I’m sure it would be in very small numbers, but are TA31s in use on the URG-I at all?

I did as well and received the chamfered MK12. My last order on 2/14/2020 had the factory DD gas block. I didn't realize it until I pulled the rail off.

Could be. I'll try to remember to take a photo tomorrow.

Probably a user choice thing at this point since they weren't really in block II. It's mostly Elcans from the pics I've seen, but they could be out there.

This should address some of the issues mentioned above.

Are they starting to issue out 11.5 yet? New here😬

Thanks.

I'd love an Elcan, but they're just too expensive for me to justify at this point

Nothing yet.

The Elcan seems cool, but I wasn't in love with the one I had. Once I got a Razor, it kinda ruined Elcans for me.
I'd rather have an ACOG and offset RDS, or just jump to an LPVO.

ETA: I guess if I painted this I could hang out in here.
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Hey i'm just popping in because im on the market to buy a MK16 13.5. I've been researching and i've seen the zero shift drop tests and the whole fiasco involving that. Would you guys recommend I buy the MK16 or should i be worried? I also have a mk8 I could buy here locally. Sorry if this question has already been answered, but i cant seem to find a consensus on whether or not the MK16 is GTG

No problem.

Use a very low profile gas block just to make sure it won't easily contact the rail.

Mine was mistakenly ran over with a ATV and was fine, that was two years ago and didn't even affect the zero.

Any rail can bend or crack, had a SR25 rail replaced for a crack and still don't know how it happened. IMO MK16 is GTG.

Buy one, if you don't like it you can easily sell it on the EE. I call dibs though if you decide to sell it

Thank you for the quick responses fellas. So the issue was mainly with the gas block ramming the the rail? I see in this thread tons of pictures of the rail being used by active duty soliders, so i'm assuming the rail is gtg. Did they make any more changes other than a smaller gas block?

edit: read through the whole thread(took about 6 hours), got my answer. I'm gonna buy it. Thanks guys. I'll add some pics here as soon as the build is done.

From what I remember reading, it was a combination of the MK16 handguard and MAWL.

IMHO, if you're a normal recreational shooter, you should be good.

My rifle fell out of a truck onto concrete this weekend and I managed to still hit pigs with my PEQ15. No bendy issues.

Can anyone verify if the smaller gas block solves this issue? Any active duty guys with these who can vouch for the MK16? I'm picking it up friday night but would love some affirmation on my buy LOL. I plan on using this rifle for SHTF scenario(very real threat now). Turns out Bill Geissele himself said he recommends the MK2 if you dont want a bendy rail(What the heck?). Yet our military is fielding this? I am so torn lol. I also have the option of buying a URX4. Anyone have one?

Go back and read the last however many pages it takes to see what I said about it.

Yeah I read your replies. It just seems like no one really knows for sure. We don't have any concrete info on whether or not the smaller gas block fixes the problem, or whether the problem still persists with mounted MAWL or equivalent. I guess there really is no answer unless someone does a documented test with the new gas blocks. Hate I have to go out on a limb buying this. Would love for some active duty guys to give their opinion. I know several guys on here have said they ran theirs over, and thats good news; but I'm still skeptical with the owner of Geissele saying he would only recommend the mk2. URX4 lookin mighty appealing

Well, considering they’re in use, without a lot of complaints I’d say they work.  We have SF armorers saying they’ve had little to no rails returned for bending.  They also said they’ve heard guys say they like them.

I’d be stunned beyond belief if these dudes were still running rails that had an issue and couldn’t hit their targets.  I mean, just think about that one for a minute.  If these rails bent on a regular basis and caused a loss of zero then don’t you think the guys that can get whatever they want would drop them in a heartbeat?  I do.

Do you own a MAWL or other other item that mounts in a similar way that has a similar mass? If so, are you going to mount it over the gas block? If so, the smaller gas block would be better but there's no evidence it wouldn't happen. If not, why are you worried about it?

I presume that the "problem" with the MK16 would happen with most if not all small diameter M-LOK rails. Would a 7075 Hodge fair better? Maybe. Does it matter in the real world? Nothing has came out about it from USASOC.

The only way to know for sure if one rail is better than another is if a third party did independent standardized testing. I'm totally up for this but I can't afford to buy a bunch of rails just to smash them up. Even with a ton of data from drop tests, it wouldn't tell you what is good enough only what is best.

Great point. Guess im gonna take the gamble.