Centurion MK11 6.5 Creedmoor Stainless 20" Barrel - MK11-65CM-20

Upgrade your precision gas-gun build with the Centurion Arms MK11 20″ 6.5 Creedmoor barrel. Machined from 416R stainless steel and finished with 6-groove, hand lead-lapped button rifling, this 20″ barrel offers a smooth bore and consistent bullet engagement for improved accuracy and extended life.

Purpose-built around the Centurion MK11 platform, the barrel features a 1:8″ twist rate, a rifle-length gas system, a .875″ gas block journal with Centurion’s alignment tab, and a 5/8×24 threaded muzzle for muzzle devices. The alignment notch behind the gas journal ensures precise gas-block placement with Centurion tabbed blocks while remaining fully compatible with any standard .875″ gas block. With a .094 gas port and a profile robust enough to serve as an HBAR-style option, this 20″ barrel balances rigidity and harmonics for superior long-range performance.

Shop the Centurion Arms MK11 20″ 6.5 Creedmoor barrel at AR-15 Discounts for competitive pricing, fast shipping, and expert support for your next precision build.

Key Features

• Caliber: 6.5 Creedmoor

• Barrel Length: 20″

• Material: 416R stainless steel

• Rifling: 6-groove, hand lead-lapped button rifling

• Twist Rate: 1:8″ RH

• Gas System: Rifle-length gas system

• Gas Journal: .875″ with Centurion alignment tab (compatible with standard .875″ gas blocks)

• Gas Port: .094″

• Muzzle Thread: 5/8×24

• Profile: Can serve as HBAR (heavy barrel)

• Weight: 4 lb 1 oz