The Geissele Automatics URG-I Complete Upper (Geissele part no. 08-315) is a faithful clone of the upper receiver group issued to USASOC operators, built in 5.56 NATO with an 11.5-inch barrel for compact, close-quarters performance. Geissele cold-hammer-forges and chrome-lines the barrel, then coats it in manganese phosphate for corrosion resistance and long service life, cutting a 1:7 twist rate that stabilizes the full range of 5.56 bullet weights. The upper pairs a Geissele MK16 modular handguard with a carbine-length gas system, a Geissele Airborne ambidextrous charging handle, and a SureFire SF4P four-prong flash hider, finished in black. It’s built for AR-platform shooters who want a genuine near-clone of a proven special-operations upper rather than an aftermarket approximation.

Key Specifications

• Chambered in 5.56 NATO for reliable feeding with mil-spec and commercial 5.56 ammunition.
• Barrel measures 11.5 inches, built for compact maneuverability.
• Cut with a 1:7 twist rate to stabilize heavier 5.56 bullet weights.
• Barrel is cold-hammer-forged and chrome-lined for extended service life and easier cleaning.
• Finished with a manganese phosphate coating for corrosion resistance.
• Runs a carbine-length gas system matched to the 11.5-inch barrel.
• Uses the Geissele MK16 modular handguard for accessory mounting and heat management.
• Includes the Geissele Airborne charging handle, an ambidextrous design for either-hand operation.
• Ships with a SureFire SF4P four-prong flash hider installed on the muzzle.
• Finished in black across the upper receiver and handguard.

Frequently Asked Questions

What caliber is this upper chambered in? 5.56 NATO, with a 1:7 twist that stabilizes the full range of common 5.56 bullet weights.

Does it include a charging handle and muzzle device? Yes, it ships with a Geissele Airborne ambidextrous charging handle and a SureFire SF4P four-prong flash hider already installed.

Will this fit my AR-15 lower? Yes, it is built to mil-spec dimensions and mates with any compatible AR-15/M4 lower receiver.

Buy the Geissele Automatics URG-I Complete Upper

Build on a genuine near-clone of the upper trusted by special operations units instead of a generic aftermarket copy. This Geissele Automatics URG-I upper pairs a chrome-lined, hammer-forged barrel with a real MK16 handguard and Airborne charging handle. Browse our AR15 uppers selection and have this one shipped direct from our Lubbock, Texas gun shop.