CMMG Barrel Sub-Assm, 5″ MT 4140CM SBN, 5.7x28mm

Barrel Sub-Assm, 5″ MT 4140CM SBN, 5.7x28mm

Complete your pistol caliber PDW build with an 5″ 5.7x28mm Radial Delayed Blowback™ barrel. Made from 4140CM, each barrel has a salt bath nitride finish for maximum durability and corossion resistance.

Bolt Carrier Group Compatibility: Radial Delayed Blowback barrels feature a unique barrel extension and require the use of matching caliber CMMG RDB bolt carrier groups. 

**All NFA rules apply** See linked CMMG Resource article for more information.

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