Build or update your Radial Delayed Blowback pistol or SBR in .45 ACP with a 6.5 inch barrel.
Bolt Carrier Group Compatibility: Radial Delayed Blowback barrels feature a unique barrel extension and require the use of matching caliber CMMG Radial Delayed Blowback bolt carrier groups. Works with spring-loaded ejector BCGs and Fixed Ejector BCGs.
**All NFA rules apply** See linked CMMG Resource article for more information.
