CMMG Mk4LEM AR-15 Upper Assembly 5.56mm 55BC7D3

CMMG, Inc.
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CMMG AR-15 Upper Receiver Group, Mk4LEM, 5.56mm

The Mk4 LEM features a nitrided 16" 4140 CrMo steel 5.56x45mm barrel with a mid-length medium taper barrel profile. The mid-length gas system offers a longer sight radius and operates a bit smoother. The medium taper profile optimizes the strength of the barrel while reducing and repositioning the weight of the rifle a for handy and quick swinging feel.

Features and Specifications:
Manufacturer Number: 55BC7D3
Caliber: 5.56mm
Barrel: 16" medium weight taper profile
Muzzle: A2 comp., threaded 1/2-28
Hand Guard: M4 type 2 piece hand guards
Receiver: Forged 7075-T6 AL M4 type