Geissele URG-I, "near clone" 11.5" Upper Receiver Group - 2021/2022 Factory Production

$1,109.95 - $1,249.00
when in-stock, ships in 5 to 7 business days from ordering
Extremely Limited Production and Availabilty:
note the specifications, which have changed


Geissele Upper Receiver Group, USASOC URG-I 11.5 inch CQBR "near clone" 2021 Geissele production


The new Close Quarter Battle Receiver is being released in the US Military and goes by a number of names, including a Mk18 upper receiver group version.  Geissele has produced an extremely limited number of what they call a URGI 11.5" upper.

This model is the Geissele near clone correct upper.  This is Geissele's commercial production of what the US Army at USASOC is using as its new Mk18 upper receiver.  This is new production, as reconfigured by Geissele in 2021.

The Mk18 started with the US Navy in 2001, as an answer to how to create a shortened M16 and M4 to use shipboard, and became a "knock the doors down" urban rifle, first being used by the US Navy SEALS during the start of the Global War on Terror, and then spread throughout SOCOM units, then to the US Marines, and finally to main Army units.  The latest evolution is known as the Mk18 Mod 3 originally by the USMC, and the CQBR Block 2 by the US Army.

Geissele, and Charlie's Custom Clones introduced the civilian version of the URGI for the M4A1 in 2018, and Geissele began to morph to a "near clone," and Charlie's and our sister design and build company, Potomac Armory to the "clone correct" versions of the URGI.  This is the latest URGI to be offered by Geissele.

Your choice of the Surefire 4-prong flash hider, or the Surefire 3-prong Warcomp flash hider (standard 3-prong available upon request)

Each URGI is fitted with the handguard Geissele designed specifically for USASOC, the MK 16 M-LOK™ Super Modular Rail handguard with a full-length Picatinny top rail and lots of slots for other accessories. T-markings are engraved on the rail but not painted white to help keep the rifle unobtrusive.

The flash hiders are not pin and welded, as there is no point with an 11-1/2 inch barrel, but they are secured with Rocksett, so they are not coming off.  Either flash hider will support a Surefire SOCOM suppressor, if you wish.


  • Geissele Mil Spec forged M4 receiver with forward assist, shell deflector & ejection port cover
  • Geissele Mk16 Super Modular Handguard with Geissele roll-marks
  • Geissele 11.5" CHF military spec CMV steel allow barrel with 1-7" rifling & 1/2"-28 tpi muzzle threads and carbine gas system, chrome-lined and exterior finished in phosphate
  • Geissele Airborne military grade charging handle, standard in DDC, but black is available on request at time of order.
  • Geissele Super Gas Block, black nitrided and pinned "bomb proof" installation by Geissele
  • Geissele Reliability Enhanced Bolt Carrier Group
  • Surefire SOCOM 4-prong flash hider or the Surefire SOCOM 3-prong WarComp timed neutral, unless you ask us for a right hand Warcomp timing
  • Manufacturer's Part Number (in 4-prong configuration) 08-315

Some may remember the original offering from Geissele in 2018 included a 30% off coupon from Surefire for both a SOCOM suppressor and a Surefire flashlight.  Those coupons are no longer offered.

What, you ask, is the difference between this newer 2021 production and the original URGI "near clone" that Geissele produced in 2018 and 2019?  There are some substantial differences that might lead the buyer to conclude this is another vairant of the Super Duty.  The first difference is that Geissele has replaced the military spec Daniel Defense barrel that the US Army uses with a Geissele produced barrel, that is very similar.  The BCG is now the commerical enhanced Geissele BCG, and the Mk12 gas block has been replaced by Geissele's low profile gas block. Aside from that, the two are very similar.  

The 2018 / 2019 URGI is listed here, while supplies last:  Geissele URGI original near clone, new old stock.

Note:  if you select WarComp, we time this as neutral (ports pointed up).  If you want it timed to the starboard side, please make sure to put that in the comments.  Both are correct.  Our gunsmiths prefer ports timed up.

NFA Comment:  The 14.5" barrel is pinned and welded to make the barrel length compliant with the National Firearms Act, and is not a short barreled upper.  Removal of the pinned flash hider will result in the upper being an NFA item, and is also not recommended, as it will cause damage to the threads of the barrel as well.

ITAR warning:  This item may only be purchased and shipped to US Persons within the USA.  This is a military item, which is restricted from export without US Government permission.