Geissele URG-I Complete Upper | Near Clone

The Geissele URG-I Complete Upper (Near Clone) is a 5.56 NATO upper receiver assembly designed for AR-15 platform rifles, available in 11.5" and 14.5" configurations. Built around a mil-spec M4 upper receiver, this complete upper includes a cold hammer forged, chrome-lined barrel, free-float MK16 handguard, and a carbine or mid-length gas system depending on barrel length. It is designed for compatibility with standard AR-15 lower receivers and is offered as a near-clone configuration of a current military-issued upper receiver group.

This upper assembly includes a bolt carrier group, ambidextrous charging handle, and muzzle device, providing a ready-to-install solution for users building or upgrading a rifle. The free-float rail supports accessory mounting, while the included gas system and buffer components are configured for consistent cycling with 5.56 NATO ammunition. The 14.5" version features a pinned and welded muzzle device to meet length requirements.

Specifications

• Caliber: 5.56 NATO
• Available barrel lengths: 11.5" or 14.5" (pinned & welded)
• Barrel material: Cold hammer forged, chrome-lined, chrome moly vanadium steel
• Barrel profile: Government profile
• Twist rate: 1:7
• Receiver: Mil-spec M4 upper receiver
• Handguard: Geissele MK16 free-float rail (10.5" on 11.5" / 13.5" on 14.5")
• Gas system:
  • 11.5" – Carbine length
  • 14.5" – Mid-length
• Gas block: Low-profile compact gas blockBolt carrier group: Included, enhanced reliability design
• Charging handle: Ambidextrous (Airborne Charging Handle)
• Muzzle device: SureFire 4-prong flash hider
• Buffer system: Included (Super 42 braided spring with H3 or H1 buffer depending on configuration)
• Weight:
  • 11.5" – Approx. 3 lbs 8 oz
  • 14.5" – Approx. 4 lbs 3 oz
• Handguard Finish: DDC (Desert Dirt Color)