M6A3 UPPER 556- 12.7"
Caliber: 5.56 NATO
Barrel Length: 12.7",
Hand Guard: ARMR-M quad rail
Front Sight: Rail Mount Flip Up-AK post
Rear Sight: Rail Mount Flip Up
Muzzle Device:A2 Flash Hider:
5.56 - 1/2 X 28 TPI
Link to parts manufacturerCaliber: 5.56 NATO
Barrel Length: 12.7",
Hand Guard: ARMR-M quad rail
Front Sight: Rail Mount Flip Up-AK post
Rear Sight: Rail Mount Flip Up
Muzzle Device:A2 Flash Hider:
5.56 - 1/2 X 28 TPI
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