CMMG Mk4 AR-15 Upper Group 5.56 NATO 16.1" Heavy Taper Barrel 1:7 Twist Carbine Gas Keymod Handguard 55B9127

Item No. ARR-118-028
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Brand: CMMG, Inc.
MFR #: 55B9127
UPC: 815835015910
Item #: ARR-118-028
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Description
CMMG Upper Group, Mk4 HT, 5.56mm

The Mk4 HT Upper Group features CMMG’s RKM11 KeyMod free float hand guard. Either a 416 stainless or nitrided 4140 CrMo steel barrels in a heavy taper profile are offered in 5.56mm and 300 BLK. The 22LR model is only available in the nitrided 4140 CrMo type barrel.

Features and Specifications:
Manufacturer Number: 55B9127
Caliber: 5.56mm
Barrel: 16.1", 1:7 twist, heavy taper, 416SS, Bead blasted finish
Muzzle: Thread protector, threaded 1/2-28
Hand Guard: CMMG RKM11 KeyMod hand guard
Receiver: Forged 7075-T6 AL M4 type

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