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GM-M4 16 inch 5.56mm NATO 1:8 Twist


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  • Model: GM-M4
  • Manufactured by: Green Mountain


Green Mountain M4 16" 5.56mm NATO 1:8 Twist, fully machined and assembled with extension, chrome lined bore and chamber, 41V50 vanadium steel, thermo-stress relieved, air gaged,drilled gas port, muzzle threaded 1/2 x 28.

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