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.

Hasn't palmetto and Sig used those O marked uppers? I've got a preorder in for a stripped upper

Gas block is Geissele also, they said it’s a new slimmer gas block.

That's what the Geissele uppers have but perhaps the issued uppers have something different.

My only question is when are they gonna be shipped?

Brownels said your CC won't be billed until they ship.

I still need a PEQ15, but might still pre order a upper.

Just a FYI OP, the actual spec is DD MK12 gas block and SF4P muzzle device.

The Brownells is not 100% clone correct.

It also appears this is very similar to the IMR that is catching interest with other branches.

At this rate, all of you guys will have them before the military does.

Yeah, I want that.

Yep...no thanks!

I will keep my M4A1 Block 1.5 all day.  I’m thinking a USASOC can be built with used parts at a considerable discount as well.  $1,400 for an upper

Easily. I could build that upper for $800 or so if I went PSA FN CHF middy.

That's actually my plan for my next build.

The only way to get the rail is with the complete or stripped upper, so I’d be curious how you’d build it for cheaper.

I think I'll just keep what I have.......Block 2.5

https://www.ar15.com/forums/Industry/Big-Thanks-to-Nick-C-S-/444-284993/

I'm sure the Mk16 will eventually be sold individually.

Yep just like the DD RIS II.....

and now they pop up on the EE regularly.

I hate this not knowing actual issued parts thing.

Not used to not knowing!

Official part list.

Geissele Mk16.
Geissele ACH.
DD 14.5" MID-LENGTH government profile CHF BARREL.
DD MK12 gas block.
Surefire SF4P.
Standard M16/M4 BCG.
Standard M4 receiver.
Standard M4A1 lower with H2 buffer.
SOPMOD stock.

Source?

Will be interesting to see who's receiver and BCG the URG is initially issued with. I know @Combat_Diver receives FN receivers and FN bolts/carriers for rebuilds, so it will also be interesting to see (down the road) if those same spare parts are kept from the same supply system. Will also be interesting to see if the "rebuild barrels" will also be DD, or come from somebody like FN down the road.

Hurry up and wait motherfucker

Damnit, I just ordered a Geissele Mk4. Wonder why they didn't pick that?

Is ARSOC getting all new uppers, like what Geissele is selling, or are they just replacing barrels and handguards on existing M4A1s? It would kind of suck dropping a grand for basically a handguard and barrel and then swapping everything else with parts I already have.

Probably still going to get one.

GS5414 confirmed it.

Just saw these hit the website. Was wondering about the barrel and now see that it is a DD. They will sell like hot cakes.

I'm bummed to see the "complete" version doesn't include the DLC BCG that Bill has been talking about for a couple years now. I thought it might finally see the light of day.

Maybe we can get Bill in here to clear it up. Its worth a shot right?

@sagmill

It's a clone. The normal BCG works fine and they can get them cheap and easy.

What's interesting to me is that this barrel is actually lighter than an M4 barrel. I wonder how much the MK16 weighs.

Well that's interesting. Id assume its not due to the larger (mid length) gas port.

Is your M4 barrel weight with FSB?

Stripped barrel comparison. It's because the thin part behind the gas block is 2" longer and the thick part in front of the gas block is shorter.

If anyone wants the full size images stripped from Brownell's site.

https://i.imgur.com/2nIs4t9.jpg
https://i.imgur.com/RBItsSP.jpg
https://i.imgur.com/RJvF4NI.jpg
https://i.imgur.com/1frk0w8.jpg
https://i.imgur.com/eluuMXT.jpg
https://i.imgur.com/E1f77H8.jpg

That makes sense.

Gotcha. That makes sense.

Makes you wonder, without the need for a barrel mounted M203, bayonet or anything of the sort. Why the hell they even picked the M4 profile in a mid length in the first place. Might as well have made the entire tube .750 O.D.  

So where's a good place to buy a CHF middy? Doesn't have to be DD.

I'm going to guess add about 3 or so oz to the mk14 and you have it

Any news on if they are planning on replacing the mk18 handguard with a shorter Geissele? Was that in the contract at all or is this strictly for 14.5" barrel upper.

I think it would be cool to build a 300Blk  Mk18 "block 3" upper to share with my CQBR upper.

Photos from the other thread.

Posted in another thread, test samples provided by Geissele.
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Posted in another thread, looks like the Mk14 and not the Mk16 rail


Geissele tweet before they announced the contract


Geissele Live announcement

DLC works a hell of a lot better if done right, and Geissele would have been the reputable company I would have trusted to do it right. And besides, don't go in those clone threads with that "close enough" attitude, they'll get after you

Besides, Bill is already making (or has access to) them: Pic

We have no idea. Details are pretty scarce on all of it ATM.

When DD RIS II came out, for the first couple of years, you could buy them individually all day long.

So then the stripped upper option would get you the closest?

Except for the the gas block?

The DD barrel is special sauce, and isn't anything like what's currently available in a midlength chf.

I don't mean to be obnoxious but do you have a source for this?

Employee of Geissele on the Geissele Owner's Group on FB.

So then the URG they are offering from brownells has this barrel?

In what way? Steel used?

More from the same employee:

From what Bill said in the livestream, coupled with the info given by the employee, yes.

That seems to me to be more reasonable. I wouldnt think USASOC wants to build their own uppers themselves. Thats what Crane does and even they are trying to get away from that as much as they can.

I would think that someone, most likely Geissele, has a contract to ship the entire upper as a complete drop in replacement.

@sdrake100

For those of us that are purists, you might want to go with the stripped urg-i-

I think that ST has/sells a FN chf 16 inch middy in a "optimum" profile.

PA has this....... DD chf middy

@GS5414

This thread. Thanks for any help with the questions here bro

Okay, I'm here.

Good lord, lots to discuss. Give me a second to catch up.

Also understand I will not answer every question. Some things just can't be said yet.

ETA :

1. List Joglee posted is correct.
2. Suppressor is legacy SOCOM556-RC
3. Shipping? Just be patient, SHOT is around the corner, everyone in the gun world is scrambling. Just give the good folks at G a chance to build them right
4. JSchell1309 - Believe it or not, those guns in your photo were Marine Corps M4s presented to the USAF in June. I know this, because I was the guy who brought them there... First prototype Mk16s, not the final ones. The photos leaked and were not supposed to, but its no harm now.
5. For a 100% spec build, yes, the stripped upper could in time get you closest, but you can't get the Mk16 standalone right now.
6. USASOC will build them themselves. Avoiding the overhead charged by Crane. Legacy Crane M4/CQBR URGs cost around $1820-$1860 a piece, and did have issues at times.

Pending any other questions, that's all I got.

S/F

Please verify my parts list.

Is there a 10.3" URG-I?

Back up iron sights?

Optics?

Thanks!