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Phase 5 M4 Profile Chrome Lined Barrel 5.56 NATO (Options)

  • Chromed bore and chamber, phosphate finish. Thermo stress relieved. Button rifled with M4 extension and M4 feed ramps.
  • Length: 7.5" 10" 14.5" 16"
    Twist: 1-7. 1-7 1-7 1-8
    Caliber: 5.56 NATO 5.56 NATO 5.56 NATO 5.56 NATO
    Gas Length: Pistol Carbine Mid Mid
    Gas Diameter: .750" .750” .750” .750”
    Weight: 1 Lb. 1.4 Oz. 1.35 Lbs. 1.7 Lbs. 1 Lb. 13.5 Oz.
    Muzzle Thread 1/2 x 28 1/2 x 28 1/2 x 28 1/2 x 28
    Material 41V50 4150 4150 41V50
  • The MSR Arms Advisor articles are intended to answer some of the most common shooter questions and assist our customers in making the best purchasing decision possible.
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