The Odin Works Extended Magazine Release Gen 3 is machined from billet 6061 aluminum and designed to work with KNS pins and the BAD lever. The XMR3 has the largest profile yet, making it easily accessible by all shapes and sizes of hands and fingers. Works with both AR15 and some AR10 lower receivers. For Aero M5 Lowers purchase the AR10 Add on button. Easy install that takes minutes. FeaturesCompatible with BAD LeverCompatible with KNS Pins.1 oz (including paddle, button, and screws)Large surface area for quick magazine reloadsEasy to reachErgonomic designRelease magazine without changing grip or positionContoured for positive depression and reduced slip