The Odin Works Extended Magazine Release is one accessory every AR needs. Machined from billet 6061 aluminum and designed to work with KNS pins. The XMR is 4x larger than a mil spec button making it easily accessible by all shapes and sizes of hands and fingers. Works with both AR15 and AR10 lower receivers. Easy install that takes minutes. FeaturesFour times larger than factory magazine buttonsLarge surface area for quick magazine reloadsEasy to reachErgonomic designRelease magazine without changing grip or positionContoured for positive depression and reduced slipWeight: 0.15oz (including button, paddle, and screws)Easy drop in installation Note: Compatible with KNS Pins. Not recommended for use with BAD lever.