CMMG ZEROED Ambi Mag Catch and Button Kit AR15. 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. Maximize ambidextrous control and speed up your reloads and with the CMMG ZEROED Extended Mag Release Button. Installation is simple just screw the adapter button in place then attach the button extension to the adapter done Quality steel construction and serrated extension surface means you get a solid feel and reliable traction every time. Specifications for CMMG ZEROED AR15 Ambi Mag Catch and Button Kit: Manufacturer: CMMG Gun Make: AR Platform Gun Model: AR-15 Condition: New Package Contents: CMMG ZEROED AR15 Ambi Mag Catch and Button Kit What firearm models does the manufacturer say CMMG ZEROED AR15 Ambi Mag Catch and Button Kit is compatible with? The manufacturer says that CMMG ZEROED AR15 Ambi Mag Catch and Button Kit is compatible with AR-15CMMG 55AFF89: ZEROED Ambi Mag Catch and Button Kit AR15