Centurion MK11 308WIN Stainless 18″ Barrel

Elevate your AR-10/LR-308 build with the Centurion Arms MK11 .308 WIN stainless steel barrel — a precision-minded barrel engineered for consistency, durability, and long-range performance. Machined from 416R stainless steel and hand lead-lapped with 5R button rifling, the MK11 delivers a smooth bore finish and excellent bullet engagement for tighter groups and longer service life.

Designed around the MK11/AR-10 platform, this barrel features a rifle-length gas system for reliable cycling and a softer recoil impulse, a 1:10″ twist rate that stabilizes a wide range of .308 bullet weights, and a 5/8×24 threaded muzzle ready for muzzle devices or suppressors. The .875″ gas block journal and .094 gas port keep the barrel compatible with standard DPMS-pattern AR-10 components while providing Centurion’s proven fit and function.

Shop the Centurion Arms MK11 .308 WIN barrel at AR-15 Discounts for competitive pricing, fast shipping, and expert support on precision barrels and AR-10 parts.

Key Features:

• Caliber: .308 Winchester

• Material: 416R stainless steel (machined finish)

• Rifling: 5R, button rifled, hand lead-lapped

• Twist Rate: 1:10″ RH — stabilizes a wide range of bullet weights

• Threaded Muzzle: 5/8×24 — suppressor / muzzle device ready

• Gas Block Journal: .875″ (DPMS/standard AR-10 compatibility)

• Gas Port: .094″