Magazine catches don't have to be an inconvenience for left-handed shooters. The CMMG ZEROED ambi extended mag catch brings the ambidextrous operation of the 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. 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.