Geissele URGI Complete Upper Receiver Group – 11.5″


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SKU: 08-315 UPC: 817953029503

Product Description

The USASOC URGI is a near-clone of the upper receiver group currently in service with the US Army Special Operations Command.
With the advent of the USASOC URGI, the American rifle silhouette has changed forever. The Geissele Super Modular Rail MK16 handguard, hammer forged barrel, and mid-length gas system work in concert for a package that delivers measurable increases in hit probability. Designed to take the full rigors of the new M855A1 (AB57) ammunition, the USASOC URGI also takes full advantage of its capabilities. Once the USASOC URGI is installed on an existing system, it essentially makes for a brand new weapon.

  • Geissele SMR MK16, DDC, 10.5″ Rail
  • SureFire SF4P 4 Prong Flash Hider
  • Mil-Spec M4 Upper Receiver Assembly
  • Geissele Airborne Charging Handle
  • Geissele Reliability Enhanced Bolt Carrier Group
  • Geissele Super Gas Block .750 Low-Profile Gas Block, Pinned
  • Super 42 Braided Wire Buffer Spring and Buffer Combo INCLUDED!
  • Geissele 5.56MM 11.5″, GOV profile, CHF, Chrome Lined Barrel




Technical Information

Caliber 5.56 NATO / .223 Remington
Finish Anodized
Firearm Compatibility
Gas Block Size .750
Color / Pattern ,
Thread Pitch 1/2 x 28
Size 11.5"
Barrel Twist 1/7

Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit

Customer Reviews

Based on 1 review
Jeremy D.
Amazing upper well worth it

Had a couple of these and one of the best uppers I’ve had!!