Gemtech GVAC Upper 5.56 NATO 16.10in 15in M-LOK BCG

The Gemtech GVAC Upper Group integrates Gemtech's GVAC system into a complete 5.56x45mm NATO upper assembly. It is engineered to reduce gas blowback during suppressed use through a proprietary barrel profile and the ETM muzzle device. This assembly ships with a bolt carrier group and a free-float Midwest M-LOK handguard for modular accessory attachment.

Key Specifications

• The caliber is 5.56x45mm NATO.
• The barrel measures 16.10 inches and uses the GVAC profile.
• The rifling uses a 1:8 twist with 5R lands and grooves.
• The upper receiver is machined from 7075-T6 aluminum with Type III hard coat anodize.
• The handguard is a 15-inch Midwest Industries M-LOK free-float with a continuous top Picatinny rail and QD sling sockets.
• The gas system is a mid-length GVAC direct-impingement design with a pinned low-profile 4140CM steel gas block.
• The muzzle device is a Gemtech ETM flash hider constructed from 4140CM steel.
• The barrel is made from 4150CMV steel, stress relieved and Armornite treated, with a nickel-boron coated barrel extension.
• The bolt carrier group includes a Carpenter 158 steel bolt and an 8620 steel carrier.
• The package weight is approximately 5.25 lb.

The Gemtech GVAC Upper Group delivers a purpose-built platform for shooters who prioritize reduced gas blowback and reliable function with suppressed shooting systems. Its combination of a GVAC-profile barrel, mid-length GVAC gas system, ETM flash hider, and a robust BCG provide a durable, adaptable upper suited for precision and duty-oriented applications where control and component quality matter.