CMMG 10217 223/5.56 AR-15 Piston Operated Complete Upper 16 in M4 HG
CMMG Upper Complete for M4-LEP II. The upper is built off the standard forged A3 receiver with M4 feed ramps. The chrome plated gas piston is mounted in a solid one piece steel gas block attached to the barrel by pins. The Gas Block's 1913 Piccatinny rail is receiver height and requires a front sight designed to be mounted on the same plane as the rear sight. The dedicated, piston specific, anti-tilt bolt carrier is one piece, machined with the piston impingement key (not a bolt on). The carrier uses the standard Mil-Spec bolt. The barrel is 4140 steel, M4 profile, 5.56mm chamber and bore, 1:9 twist ratio and 1/2x28 threaded barrel and has the proprietary WASP surface treatment. The upper is finished with M4 Handguard caps, M4 handguards and as A2 flash hider installed with a crush washer.
SPECIFICATIONS:
Mfg Item Num: 10217
Category: UPPERS
Type :Complete Upper
Caliber :223 Remington/5.56 NATO
Sights :None
Barrel Length :16 in
Barrel Material :WASP Treated 4140 Chrome -Moly Steel
Twist :1:9
Barrel Description :M4 Profile
Barrel Finish :Black
Receiver Description:A3
Receiver Finish :Black
