Gemtech GVAC Complete Upper Reciver Group 223 Remington/556 NATO 16.1" Barrel 1:8 Twist Gemtech ETM Flash Hider Pinned Low Pro GVAC Gas Block Mid Length Gas System Anodized Finish Black MLOK Handguard Fits AR-15 Includes Bolt Carrier Group 138

Introducing the new GVAC system from Gemtech. Significantly reduce the amount of gas blowback youll 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
• MUZZLE DEVICE - Gemtech ETM Flash Hider, 4140CM Steel
• BOLT CARRIER GROUP - Carpenter 158 steel bolt, 8620 Steel Carrier, Mil-Spec MP Tested, Mag-Phos Finish, Chrome Lined, Properly staked Gas Key, Enhanced reliability bolt carrier and chrome firing pin.
• HANDGUARD - 15” Midwest Industries Combat M-LOK Free-Float Seven Sided M-LOK hand guard. Continuous MIL-STD 1913 Picatinny Top Rail, Integrated QD sling sockets. Machined from 6061-T6 Aluminum, and Type III Hard Coat Anodized.