M4-profile 16" barrel is cold hammer forged from high-grade chromium-molydenum-vanadium alloy steel for exceptional strength and accuracy potential—like a high-end, match rifle barrel. Magnetic particle inspected (MPI) to ensure there are no internal flaws in the metal before application of the durable, heavy-duty manganese phosphate finish for superb resistance to corrosion and surface abrasion. These barrels come with the barrel extension and front sight tower installed, and are fully chambered for the military 5.56mm NATO cartridge, with a 1-7" right-hand twist. Bore is chrome-lined for extra protection from corrosion. Barrel extension has M4 feed ramp cuts, and sight tower includes bayonet lug and sling swivel attachment point (swivel not included). Gas port is drilled and muzzle is pre-threaded to accept a ½"-28 tpi flash suppressor. Standard model replicates the USGI M4 barrel, complete with cut for M203 grenade launcher. Lightweight model offers a slimmer profile for a fast-handling, “pencil” barreled tactical or personal defense carbine. Mid-Length model offers the USGI M4 profile on a barrel that will fit a rifle with a commercial mid-length gas system; straight barrel, no grenade launcher cut. 10.3” Government Carbine model has a slim profile under the handguards with a larger .750 diameter at the gas block. This barrel does not include a front sight base. 14.5” M4 Carbine model replicates the USGI M4 barrel in both profile and length. This barrel does not include a front sight base. 14.5” Lightweight Carbine model has a slim profile for the entire length of the barrel. This barrel does not include a front sight base. 16” M4 Carbine is the same barrel as the 16” M4 Carbine with FSB, but without the front sight base. 16” Lightweight Carbine is the same as the 16” Lightweight Carbine with FSB, but without the front sight base. 16” Government Mid-Length is the same barrel as 16” Government Mid-Length with FSB, but without the FSB. 16” Lightweight Mid-Length model has a slim profile for the entire length of the barrel, with a mid-length gas system. This barrel does not include a front sight base. 16” 6.8 SPC Government Mid-Length is chambered for 6.8 SPC with a slim profile under the handguards and a larger .750 diameter at the gas block. This model also has 5/8x24 Threads and 1-10 rifling. This barrel does not include a front sight base. 18” Strength 2 Weight model has a contour that tapers from a heavy profile at the receiver to .750” at the gas block. This barrel does not include a front sight base.
SPECS:
4150 chrome-moly-vanadium carbon steel alloy, manganese phosphate finish, matte black. 16½"(40.6cm) O.A.L. Chambered for 5.56mm NATO. 1-7" twist. ½"-28 tpi muzzle threads.
Standard – .645" O.D. under handguard, .750" O.D. at gas port position, .700" O.D. at muzzle. 2 lbs. 1 oz. (931g) wt.
Lightweight – .645" (1.6cm) O.D. under handguard, .625" (1.6cm) O.D. at gas port, .620" O.D. at muzzle. 27.2 oz. (771g) wt.
Mid-Length – .630" O.D. under handguard, .750" O.D. at gas port position, .700" O.D. at muzzle. 2 lbs. 3 oz. (916g) wt.
10.3” Government Carbine - .750” O.D. at the gas port
14.5” M4 Carbine - .750” O.D. at the gas port
14.5” Lightweight Carbine - .625” O.D. at the gas port
16” M4 Carbine - .750” O.D. at the gas port
16” Lightweight Carbine - .625” O.D. at the gas port
16” Government Mid-Length - .750” O.D. at the gas port
16” Lightweight Mid-Length - .625” O.D. at the gas port
16” 6.8 SPC Government Mid-Length - .750” O.D. at the gas port. Chambered for 6.8mm SPC. 1-10 twist. 18”Mid-Length - Strength 2 Weight (taper from heavy contour to .750” O.D. at gas block location) – no gas block included, 1:7 twist chrome lined with salt bath nitride exterior.
Catalog page 17