The Gemtech GVAC Upper Group is an AR-15 upper group chambered in 5.56 NATO with an 11.50" barrel. The 5.56 NATO chamber runs both 5.56 NATO and .223 Remington ammunition, so the upper handles range ammo and match loads alike.

The 11.50" barrel carries a 1:8 twist and 1/2x28 threads under a 10.50" Midwest M-LOK handguard, runs a mid-length GVAC gas system and is capped with a Gemtech ETM flash hider, all in an Armornite finish. It stays short and handy, especially with a suppressor on the muzzle. Installed on a lower with a stock it forms a short barrel rifle under the NFA, so confirm federal, state and local law before building.

• Brand: Gemtech
• Model: GVAC Upper Group
• Caliber: 5.56 NATO / .223 Remington
• Barrel Length: 11.50", 1:8 Twist, 1/2x28 Thread
• Gas System: Mid-Length GVAC
• Handguard: 10.50" Midwest M-LOK
• Muzzle Device: Gemtech ETM Flash Hider