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  • CMMG Complete 16" M4 LE Upper .300 Blackout
  • CMMG Complete 16" M4 LE Upper .300 Blackout

CMMG Complete 16" M4 LE Upper .300 Blackout
$649.95

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This CMMG complete upper assembly is chambered in .300 AAC Blackout. Simply add a rear sight, mount it to a complete AR-15 lower, and head to the range.

Caliber: 300 Blackout                                                                                                 Barrel: 16.1″, 1:7 twist, multi-role, 4140CM, SBN
Muzzle: A2 comp., threaded 5/8-24
Hand Guard: M4 type 2-piece hand guard
Receiver: Forged 7075-T6 AL M4 type upper
Gas Port Location: Carbine

The CMMG Mk4LE OR 300 BLK Upper Receiver Group is chambered for the 300 AAC Blackout (7.62x35mm) cartridge. It features a 16", M300 profile, 4140 chrome-moly steel barrel. A salt bath nitrided finish is applied to the barrel inside and out for improved wear, abrasion, and corrosion resistance. The Mk4LE comes with an M4 hand guard. The barrel of the CMMG Mk4LE OR 300 BLK Upper Receiver Group has a 1:7" twist, and the muzzle utilizes an A2 compensator with a 5/8"-24 thread.

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