Geissele Automatics 5.56 USASOC Improved Barreled AR-15 Near-Clone Upper Receiver - Desert Dirt - 10.3"

SKU: 08-177
MPN: 08-177
Manufactured by Geissele Automatics


Out of Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.


Out of Stock


NOTE: This upper assembly has a barrel less than 16” in length. These uppers are intended for use in AR-15 pistols or legal short-barreled rifles. Other configurations may violate Federal law.

With the Geissele Automatics USASOC Improved Barreled Upper Receiver, you can build a near-clone of the URGI 5.56 carbine. This Geissele AR-15 barreled upper receiver features the 10.3” cold hammer forged Daniel Defense barrel with a carbine length gas system and tuned to take full advantage of the M855A1 ammunition. The barrel is threaded 1/2x28 and does not come with a muzzle device attached, so you can choose your favorite or use the Surefire SF4p 4 prong flash hider. This version uses the 9.3” MK16 free floated M-LOK handguard that protects the gas block while leaving enough room for a suppressor to be attached. One of the toughest handguards on the market, the MK16 offers plenty of options for setting up your AR however you see fit and features a desert dirt anodized finish.

  • Near clone of the USASOC URGI weapon system
  • 10.3” CHF Daniel Defense barrel
  • Carbine length gas system
  • Pinned Geissele Super Gas Block
  • Threaded 1/2x28
  • 9.3” Geissele Super Modular Rail MK16 handguard
  • Desert Dirt anodized finish
  • 8 sides of M-LOK attachment slots
  • M4 flat top Mil-Spec upper receiver
  • Type III hardcoat anodized
  • Does not include BCG, charging handle, muzzle device

The M4 flat top upper receiver is built to Mil-Spec dimensions out of 7075-T6 aluminum with a type III hardcoat anodized finish. Not included are the charging handle and bolt carrier group to give you a little room for whichever parts that you want to use. You can’t go wrong with the Geissele Airborne charging handle and Daniel Defense BCG. It attaches to any Mil-Spec lower receiver group with pistol buffer tube or legally registered SBR lower, so you can have a completely new weapon system. This barreled upper group features many of the parts used on the USASOC URG-I weapon system but is designed for civilian semi-automatic AR-15 lower receivers.

Geissele Automatics manufactures confidence, offering quality triggers and components for the warfighter and competitor. They were established in 2004 with the mission to build the highest quality, reliable triggers for competition and their first trigger, the Hi-Speed National Match trigger, was so popular that they were asked by the Department of Defense to produce a select-fire trigger for the United States Special Operations. Again, it was a success and Geissele decided to bring a semi-automatic version to the civilian market for law enforcement and personal protection.


Barrel CoatingManganese Phosphate
Barrel ContourS2W
Barrel Length10.3
Barrel LiningChrome
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandGeissele Automatics
Caliber Gauge5.56 NATO
Gas System LengthCarbine
Gas System TypeDirect Impingement
Handguard9.3 in Geissele MK16
Thread Pattern1/2 X 28
Twist Rate1:7

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

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