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)
