San Tan Tactical ultra grip bolt catch is a drop-in replacement for any standard Mil-Spec bolt catch. The thumb pad features the San Tan original Ultra Grip texture. This ultra grip texture increases positive engagement as well as enhancing your rifle's appearance. The non-slip grooves of the ultra grip texture and the paddle's ergonomic design allow for easy operation even with gloves. This drop-in Ultra Grip Bolt Catch is Mil-Spec, B.A.D. lever compatible, and made in the USA.