Cold Hammer Forged For Superb Accuracy; Chrome-Lined For Long Life
These barrels are cold hammer-forged from high-grade chromium-molybdenum-vanadium alloy steel for exceptional strength and accuracy potential—like a high-end match rifle barrel. Magnetic particle inspection (MPI) ensures there are no internal flaws in the metal. Durable manganese phosphate finish give excellent resistance to surface wear. Available drilled for either Carbine or Mid-Length gas system (indicated in table below). M4 Carbine barrel replicates the USGI M4 barrel profile. Lightweight barrel offers a slimmer profile than the M4 Carbine barrel, with .625" OD at the gas block. Government barrel is slim under the handguard, with standard .750" O.D. at the gas block. S2W® “Strength 2 Weight” barrel has extra length and starts with a heavy profile at receiver, tapering to .750" at gas block. All bores are chrome lined, except for 6.8 SPC and 300 AAC Blackout (330 BLK). Barrel extension has M4-type feed ramps. Choose caliber, profile, length, and gas block/sight base option to fit your needs. Barrels with a gas block/sight base are indicated with FSB.
AR-15, Issue:08, Page:015
Big Book Catalog, Issue:65, Page:015
SPECS: 4150 chome-moly-vanadium steel, manganese phosphate finish, matte black. Leightweight models have .625" O.D. at the gas block. All other models have .750" O.D. at the gas block. All models have ½"-28 tpi muzzle threads, except 300 blackout and 6.8 SPC, which has 5⁄8"-24 tpi threads. All NFA rules apply.