The Gemtech GVAC Upper Group (brand part number 13833) is a complete 5.56mm AR-15 upper assembly with a 16.1-inch barrel and a 1:8 twist rate, built by Gemtech, a manufacturer better known for suppressors but also producing complete upper assemblies for the AR-15 platform. Listed as a Complete-style upper, the GVAC measures approximately 30 inches overall and is built to bolt directly onto a compatible AR-15 lower receiver, giving builders a ready-to-run 5.56mm option from a company with deep experience in gas and muzzle device engineering.

Key Specifications

• Barrel length is 16.1 inches, chambered in 5.56mm/.223 Remington.
• Twist rate is 1:8, suited to a wide range of 5.56 bullet weights.
• Overall length is approximately 30 inches as assembled.
• Listed as a Complete style upper group.
• Ships at approximately 5.25 pounds, boxed.

Frequently Asked Questions

Does this upper include a bolt carrier group? It is listed as a Complete-style upper; confirm current BCG inclusion on the listing before ordering.

Will this fit a standard AR-15 lower? Yes, it is built to mate with standard mil-spec AR-15 lower receivers.

Buy the Gemtech GVAC 5.56mm Upper Group

Add a ready-to-run 5.56mm upper from a name known for precision gas system engineering. Order this AR-15 upper from our Lubbock, Texas gun shop for fast, insured shipping to your door.