Barrel, 40 S&W, 5", MT

Complete your pistol caliber PDW build with an 540 S&W Radial Delayed Blowback(TM) 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. All CMMG products are backed by our Lifetime Quality Guarantee.Learn More.