CMMG GP 20in 5.56mm Rifle Length Barrel (55D21E1)

CMMG GP 20in 5.56mm Rifle Length Barrel (55D21E1)


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Type: Barrels

  • 4150CMV CL
  • Government Profile
  • 4150 Chrome Moly Vanadium
  • Chrome Lined
  • Maganese Phosphate Coated
  • 1:7 Twist
  • 5.56x45 NATO Chamber
  • Threaded 1/2-28
  • Rifle length gas port
  • .750" Gas Journal
Caliber 5.56x45 NATO Chamber
Barrel Type Government Profile
Length, in 20"
Material 4150 Chrome Moly Vanadium
Twist Rate 1:7
Thread Pitch 1/2-28

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