Gun Parts & Accessories
Anchor Harvey upper M4 cuts with a Black River Tactical 11.5 inch barrel. Great barrel here's specifications
Features
BRT OPTIMUM CQB Light Profile (.750 Gas Block)
Carbine Length Gas System
BRT Gas Drive
1/2-28 Suppressor Ready Muzzle Thread
6P Rifling 1/7 Twist
4150 CrMoV Steel per...