CMMG Mk4 AR-15 Upper Group 5.56 NATO 16" Medium Taper Stainless Barrel 1:7 Twist Carbine Gas Keymod Handguard 55B59EC

CMMG, Inc.
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Featuring CMMG's RKM KeyMod free float hand guard, the Mk4T upper assembly would be an excellent choice for your next build. This upper has a 16" stainless steel medium weight taper profile barrel, and is ready to pin to any mil-spec lower. The KeyMod system provides incredible modularity and versatility as well as providing more than adequate cooling ventilation for the barrel.

Features and Specifications:
Manufacturer Number: 55B59EC
5.56 NATO (accepts .223 Remington)
16" medium weight taper profile, 416 stainless steel
1:7" twist
Muzzle threaded 1/2-28
A2 compensator
Forged 7075-T6 aluminum receiver, hard coat type III anodized
M4 feed ramps
CMMG RKM11 KeyMod hand guard
Charging handle
Bolt carrier group included


Item#: ARR-118-021