Gemtech GVAC Upper Receiver 5.56 NATO 16.1″ 15″ M-LOK

Description

The Gemtech GVAC Upper Receiver Group is built to reduce gas blowback when shooting suppressed through a patented GVAC design. It pairs a GVAC-profile barrel with a mid-length GVAC direct-impingement gas system and Gemtech’s ETM flash hider to manage gas and muzzle signature. The assembly ships with a Mil-Spec bolt carrier group and a 15″ Midwest Industries free-float M-LOK handguard for modular accessory mounting. This upper is sold without a charging handle.

Key Specifications

• Caliber is .223 REM/5.56 NATO.
• The barrel length is 16.10″.
• The rate of twist is 1:8″.
• The barrel material and treatment are 4150CMV steel, stress relieved, Armornite treated.
• The upper receiver material and finish are 7075-T6 aluminum, Type III hard coat anodized.
• The gas system is a mid-length GVAC direct-impingement system with a pinned low-pro GVAC gas block.
• The muzzle device is a Gemtech ETM flash hider.
• The handguard is a 15″ Midwest Industries Free-Float M-LOK with continuous Picatinny top rail and integrated QD sling sockets.
• The bolt carrier group is Carpenter 158 bolt with 8620 carrier, Mil-Spec MP tested, chrome lined.
• The muzzle thread pattern is 1/2×28.

This GVAC upper brings a purpose-built combination of components for shooters who prioritize reliable suppressed operation and a modular platform for accessories. With a robust barrel and proven BCG, plus a full-length top rail and M-LOK attachment points, it supports a wide range of configurations for field, range, or precision-focused use.