The CMMG ZEROED Ambi Mag Catch provides the ambidextrous operation of CMMG's original ambidextrous magazine catch along with an extended-release bar for more leverage. Maximize ambidextrous control and speed up your reloads with the CMMG ZEROED Extended Mag Release Button. Easy to install and built from quality steel construction, with a serrated extension surface, means you get a solid feel and reliable traction every time. All CMMG products come with CMMG's Lifetime Quality Guarantee. Designed for Mil-Spec AR-15 Lower receivers.