CMMG ZEROED Extended Ambi Magazine Catch Mk9 Radial Delayed Blowback Black. The CMMG ZEROED ambi extended mag catch brings the ambidextrous operation of our original ambi mag catches along with an extended-release bar that gives shooters more leverage. Works with mil-spec style and aftermarket mag release buttons. Check out the ZEROED Ambi Mag Catch and Button Kit for maximum ambidextrous capability. Specifications for CMMG ZEROED Mk9 Extended Ambi Magazine Catch: Manufacturer: CMMG Gun Make: CMMG Gun Model: CMMG Mk9 Condition: New Condition Quality: Excellent Condition Details: Other Package Contents: CMMG ZEROED Mk9 Extended Ambi Magazine Catch What firearm models does the manufacturer say CMMG ZEROED Mk9 Extended Ambi Magazine Catch is compatible with? The manufacturer suggests that CMMG ZEROED Mk9 Extended Ambi Magazine Catch is compatible with CMMG Mk9CMMG 91AFE69: ZEROED Extended Ambi Magazine Catch Mk9 Radial Delayed Blowback Black