In Stock SKU: 08-315

MODEL/DESC: URG-I Complete 11.5" 5.56MM

Inspired by the US Army Special Operations Command's (USASOC) URGI upper receiver group, the Geissele Automatics MK16 Improved Near Clone Upper Receiver (11.5") elevates the M4 platform for modern combat scenarios. This complete upper features a lightweight, modular MK16 handguard for comfortable handling and accessory attachment. A hammer-forged 11.5" barrel and carbine gas system contribute to improved accuracy and maneuverability. Chambered in 5.56 NATO, it's specifically optimized for the new M855A1 ammunition, ensuring reliable performance. The included Super 42 buffer spring and H3 buffer ensure smooth operation. This near-clone upper receiver faithfully replicates the USASOC URGI's design, offering exceptional reliability and modularity for tactical applications.

Note: Due to the 11.5" barrel length, this upper requires an ATF tax stamp and registration as a Short Barreled Rifle (SBR) when assembled into a complete rifle.


  • Mil-Spec M4 Upper Receiver Assembly
  • Geissele Reliability Enhanced Bolt Carrier Group
  • Geissele Airborne Charging Handle (DDC)
  • Geissele SMR MK16 Handguard (DDC, 10.5”)
  • Geissele 11.5" barrel chambered in 5.56 NATO, hammer forged
  • Government Profile Barrel
  • Chrome Lined Barrel
  • Carbine Gas System
  • Mag Phosphate Finish for enhanced wear resistance
  • ChromolyV Steel Barrel Material
  • 1:7 Twist Rate
  • Geissele Super Gas Block
  • Pinned Gas Block Installation
  • .067" Gas Port Size
  • SureFire SF4P 4 Prong Flash Hider
  • Super 42 Braided Wire Buffer Spring and H3 Buffer Combo

MFG Geissele
MODEL URG-I Complete 11.5" 5.56MM
TITLE Geissele URG-I Complete 11.5 5.56MM

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