The Maple Ridge Armoury Match 5R Nitride AR-10 barrel is precision CNC machined in Canada from premium, GBQ 4140 CMV steel blanks. These button rifled blanks are honed, lapped, and stress relieved providing the best foundation to machine and assemble our line of premium barrels. All V1 Match Nitride AR-10 barrels are backed by our 1 MOA or better accuracy guarantee and lifetime warranty.
All MRA Match 5R Nitride barrels have precision cut chambers, gas ports, and an 11 – degree target crown . The M118LR chamber will safely accept both 308 Win and 7.62×51 NATO cartridges and effectively accommodate the ogive of the Sierrra 168 and 175 HPBT cartridges loaded near or at magazine length. The 1:11.25″ twist rate will effectively stabilize projectiles between 147 and 175 grains achieving optimal performance with the heavier projectiles in the spectrum. We use an SPR profile to achieve an optimal balance between harmonic resistance , heat resistance, and weight savings. The unique deep cut fluting presents greater barrel surface area to facilitate improved air cooling while dramatically reducing weight without compromising the overall rigidity of the barrel. We also offer a Tapered Pencil profile to achieve the greatest possible weight savings while maintaining structural integrity.
All Maple Ridge Armoury Match 5R Nitride AR-10 barrel undergo QPQ Black Nitride heat treatment. This heat treatment provides superior corrosion, wear, and abrasion resistance. Instead of adding material to the bore (like Chrome lining), Nitride treats the existing steel by imbuing nitrogen into the surface of the steel both inside and out. In this way, the Nitride process offers excellent accuracy potential.
- Material: 4140 CMV Steel
- Treatment: QPQ Black Nitride
- M118LR chamber, 308 bore – 1:11.25” twist rate (Will safely accept 308 Win and 7.62×51 cartridges)
- 5R rifled, honed and hand lapped
- 11 degree target crown
- Precision cut chamber and gas port
- Barrel Extension: DPMS pattern, M4 feed ramps, Nickel Boron plating
- Profile: SPR
- Fluting Style: Straight
- Gas Journal: .750″
- Gas Length: Rifle Length DPMS
- Muzzle Thread: 5/8″ x 24
- Barrel Length: 18.6″, 20″
- SPR fluted 18.6″: 2lbs 8oz
- SPR fluted 20″: 2lbs 10oz
- Taper Pencil: 1lb 15oz
- Accuracy Guarantee
- Lifetime Warranty
- Made in Canada