CMMG ZEROED Extended Ambi Magazine Catch AR15 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 AR15 Extended Ambi Magazine Catch: Manufacturer: CMMG Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Package Contents: CMMG ZEROED AR15 Extended Ambi Magazine Catch What firearm models does the manufacturer say CMMG ZEROED AR15 Extended Ambi Magazine Catch is compatible with? The manufacturer says that CMMG ZEROED AR15 Extended Ambi Magazine Catch is compatible with AR-15CMMG 55AFE96: ZEROED Extended Ambi Magazine Catch AR15 Black