Jacob Grey Firearms 7.62x39 Threaded AR Heavy Barrel

Jacob Grey Firearms AR-15 heavy parkerized 7.62x39 barrel. Available in two models: 7.5 inch and 10.5 inch lengths for AR-15 platform. Both feature a carbine (10) twist 1:10, 5/8x24 threaded muzzle, and parkerized finish. Barrel material is 4150 Chrome Moly Vanadium (CMV). Finish is Parkerized. Gas block journal size is .750 in. Flutes: No. Gas system length varies by model: 7.5 in uses a pistol-length gas system; 10.5 in uses a carbine-length gas system. Weight: 19 oz (7.5 in) or 27 oz (10.5 in). WARRANTY: Lifetime. Manufacturer recommends an enhanced firing pin and Winchester 123gr ammunition with these barrels; H3 Buffers and heavy-duty bolt extractors are also recommended for AR-platform rifles using this barrel. Compatible with AR-15 platforms.