The Maple Ridge Armoury Match 5R Stainless AR-15 barrel is precision CNC machined in Canada from premium, GBQ 416R stainless steel blanks. These button rifled blanks are honed, lapped, and stress relieved. Honing controls bore dimensions down to a tolerance of 0.0001″ and lapping is added quality assurance to ensure a concentric and uniform bore. The blanks are air gauge tested during final inspection to ensure the most exacting tolerances.
All MRA Match 5R Stainless AR-15 barrel have precision cut chambers, gas ports, and an 11 – degree target crown. We use an SPR profile to achieve an optimal balance between harmonic resistance , heat resistance, and weight savings. Our unique deep cut fluting improves air cooling and reduce weight without compromising the integrity of the barrel. The 1/8” twist effectively stabilizes projectiles between 55gr and 77gr and the 223 Wylde chamber safely accepts both 223 Remington and 5.56x45mm NATO cartridges.