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CMMG Inc. AR-15 5.56mm NATO Barrel Sub Assembly 16.1" Mid-Length Gas 1:7" Twist Medium Taper Profile 4140 Chrome-Moly Salt Bath Nitride Finish Black 55DC70A

CMMG, Inc.
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CMMG Inc. makes high quality parts and accessories for the AR-15 platform. This particular barrel is made from 4140 Chrome Moly steel and features a salt bath nitride finish. CMMG machines these barrels to strict tolerances to ensure high quality and years of reliable service.

Specifications and Features:
CMMG Inc. AR-15 Barrel 55DC70A
5.56mm NATO (Accepts .223 Remington)
1:7" Twist Rate
16.1" Barrel Length
Medium Taper Profile
Mid-Length Gas Port Location
.750" Gas Block Size
4140 Chrome-Moly Salt Bath Nitride Finish
Muzzle Threaded 1/2" x 28 TPI


Item#: 7-55DC70A
Total number of Reviews: 3

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5.0 5
"Easy to install. No issues with gas block install or alignment nice predrilled detent to help with gas block install. Clean threading for break/hider. Shoots great semi auto or....not. Could not be happier with this barrel."
5.0 5
"Fit, finish, and function are as expected. Great. Packaged to insure it arrived in perfect condition. Shoots great. The better the ammo, the better the groups that it prints. CMMG is known for great rifles and parts, this is no exception. I plan on using CMMG barrels on all my builds."
5.0 5
"After breaking in and 10 months of use I checked the accuracy using a Redfield 3x9 Battlezone Tac-MOA scope and shooting M855 green tip. At 100 yds with front and rear bags, a 1/4 value wind from my 4 to 5 o'clock to my 10 to 11 downrange it printed dime sized three shot groups. I would update it to Fantastic Barrel for the Money."