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CMMG 55B2140 Upper Group, Mk4 A4, 5.56mm
$796.95
CMMG 55B2140 Upper Group, Mk4 A4, 5.56mm
The classic AR15 Upper Group configuration, based on the M16A4. The CMMG 55B2140 Mk4 A4 Upper Group’s defining characteristic is its 20″ government profile barrel. The 5.56mm barrel is chrome-lined and built to the military’s stringent specifications.
| PRODUCT SPECIFICATIONS | |
| Caliber: 5.56mm Barrel: 20″, 1:7 twist, government profile, 4150CMV CL, phosphate finish Muzzle: A2 compensator, threaded 1/2-28 Hand Guard: Rifle length 2 piece hand guards Receivers: Forged 7075-T6 AL M4 type upper Gas Port Location: Rifle |
Upper Group consists of: Upper Receiver Assembly (Upper Receiver, Ejection Port Cover, Forward Assist) Barrel Sub-Assembly Hand Guard and Barrel Nut Charging Handle Bolt Carrier Group |
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