The SI Strike Magazine Catch Assembly is a billet magazine release button sculpted from a solid piece of 6061 aluminum that provides a functional and aesthetic upgrade to any AR. Featuring deep serrations and an ergonomic shape, this Strike Industries magazine catch enables positive engagement and identification even in dark or adverse conditions. Features: a Blind thread and color anodized options provide unique, custom look a Textured for positive feel and manipulation a Solid billet aluminum construction a Includes (1) Billet Magazine Release, (1) Enhanced Magazine Catch, & (1) Magazine Catch Spring