GM-M68-OS 12.7" 5.56x45mm 1:7 Twist AR15 Barrel Chrome/Phos

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Item Number: GM-M68-OS
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  • Caliber- 5.56x45mm
  • Twist Rate- 1:7
  • Length- 12.7"
  • Profile- Please find the detailed drawing of this barrel in the photos above
  • Extension- M4
  • Finish- Chrome lined bore and chamber with a phosphate finish
  • Gas System Length- Carbine
  • Gas Block OD- .624"
  • Steel Type- 41V50CM
  • Thread Pitch- 1/2x28