The Gemtech GVAC Upper Group is an AR-15 upper group chambered in 5.56 NATO with a 14.50" barrel. The 5.56 NATO chamber runs both 5.56 NATO and .223 Remington ammunition, and the 1:8 twist stabilizes a broad range of bullet weights, from range ball to heavier match loads.

Gas is handled by the mid-length GVAC system, and a 13.37" Midwest Industries M-LOK handguard leaves room for lights, grips and other accessories. The 1/2x28 threaded muzzle carries a Gemtech ETM flash hider, and the Armornite finish protects the metalwork. Under 16" it forms a short barrel rifle on a stocked lower unless a permanently attached muzzle device brings it to 16", so confirm federal, state and local law before building.

• Brand: Gemtech
• Model: GVAC Upper Group
• Caliber: 5.56 NATO / .223 Remington
• Barrel Length: 14.50", 1:8 Twist, 1/2x28 Threaded
• Gas System: Mid-Length GVAC
• Handguard / Muzzle: 13.37" Midwest M-LOK, Gemtech ETM Flash Hider
• Finish: Armornite