Complete your AR pistol build with an 8" 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 the matching caliber RDB bolt carrier group.
**All NFA rules apply** See linked CMMG Resource article for more information.
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