CMMG Radial Delayed Blowback Action Tuning Kit . The optional Action Tuning Kit allows you to adjust the action to your preference much like changing buffers or changing gas port settings on an adjustable gas block. Includes 1 oz. weight 2 oz. weight 3.4 oz. weight (standard 9mm) and 3 - 0.250x0.625-inch roll pins. Specifications for CMMG Inc Action Tuning Set For Mkg45 Guard Series: Manufacturer: CMMG Gun Make: CMMG Gun Model: CMMG MkG-45 Guard Condition: New Package Contents: CMMG Inc Action Tuning Set For Mkg45 Guard Series The Cmmg Inc Cmmg Action Tuning Set For Mkg45 Guard Series is a quality addition to the CMMG lineup. For more great deals on Bolt Carrier Groups by CMMG please browse our CMMG Inc Gun Parts page. What firearm models does the manufacturer say CMMG Inc Action Tuning Set For Mkg45 Guard Series is compatible with? The manufacturer suggests that CMMG Inc Action Tuning Set For Mkg45 Guard Series is compatible with CMMG MkG-45 GuardCmmg Inc Cmmg Action Tuning Set For Mkg45 Guard Series