The Gemtech GVAC upper receiver is a complete AR-15 upper built around Gemtech’s GVAC profile to improve suppressed-shooting behavior and system reliability. It pairs a 16.1″ GVAC-profile barrel with a pinned low-profile mid-length GVAC gas system and a 15″ M-LOK free-float handguard for modularity and accessory mounting. The package includes a Gemtech ETM flash hider and a bolt carrier group for immediate installation on a compatible lower.
Key Specifications
- The caliber is .223 REM / 5.56 NATO.
- The barrel length is 16.10 inches.
- The twist rate is 1:8.
- The barrel is made from 4150CMV steel with Armornite treatment and 5R rifling.
- The gas system is a pinned low-pro mid-length GVAC direct-impingement.
- The muzzle is threaded 1/2×28 and fitted with a Gemtech ETM flash hider.
- The handguard is a 15″ Midwest Industries Combat M-LOK free-float with a continuous MIL-STD 1913 Picatinny top rail.
- The upper receiver is 7075-T6 aluminum, Type III hard coat anodized.
- The bolt carrier group is a Carpenter 158 bolt with an 8620 steel carrier, chrome lined and properly staked gas key.
- The listed shipping weight is 5.25.
The GVAC upper combines materials and features intended for durability and suppressed-shooting performance. Its GVAC barrel profile, pinned low-pro gas system, integrated ETM muzzle device, and included bolt carrier group provide a ready foundation for precision-oriented AR-15 builds where reduced backflow and consistent cycling are priorities.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.
