Gemtech GVAC Upper Receiver W/Bolt Group Black 5.56MM NATO 16.1" Barrel (NO Charging Handle)

Introducing the new GVAC system from Gemtech. Significantly reduce the amount of gas blowback you'll experience wwhen shooting suppressed with its patented design. The re-imagined barrel profile enhanced bolt carrier profile enhanced bolt carrier group and ETM muzzle device maximize peformance so nothing holds you back. Redefine suppressed shooting with the GVAC system.

• UPPER RECEIVER - Mil-Spec with Indexing Marks and M4 Feed Ramps. 7075-T6 Aluminum Type III Hard Coat Anodized
• BARREL - 4150CMV Steel Stress Relieved Armornite Treated 1:8 Twist 5R Rifled GVAC Profile Nickle Boron Coated  barrel Extension 1/2X28 TPI Muzzle Threads
• GAS SYSTEM - Pinned Low-Pro GVAC Gas Block 4140CM Steel Mid-Length GVAC Direct-Impingement