CMMG AR-15 Complete Upper Receiver .223/5.56 NATO 16" 1:9" Twist WASP Treated M4 Profile Barrel Flat Top Standard Carbine Length Handguards Low Profile Micro Gas Block W/BCG and Charging Handle Black 55B90AD

CMMG, Inc.
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Specifications and Features:
CMMG 16" M4 LPG Upper
4140 chrome-moly vanadium steel
5.56x45 NATO chamber
Caliber: .223 Remington
1:9 Twist Rate
1/2x28 RH Muzzle Thread
WASP Coated Chamber and Surface Treatment
Not Chrome Lined
Semi-Auto Bolt Carrier and Charging Handle
M4 contour barrel profile
M203 40mm Grenade Launcher Mounting Capability
M4 feed ramps
M4 Style Handguards
11 degree recessed target crown
Low Profile Micro Gas Block
Parkerized Barrel including under the front sight base
A2 Flash hider installed with Peel washer
Forged A3 upper receiver are T marked with extended feed ramp cuts (M4 ramps)
Made In USA