Battle Arms Development, Inc. is a design, research, and development firm focusing on small arms design including firearm components, tools, gauges, accessories, and complete weapon systems. All B.A.D. Inc. products are made in the U.S.A. and held to the highest manufacturing standards to exceed the expectations of the most demanding users.The Enhanced Bolt Catch is a must-have upgrade that is simple to install and improves the functionality of any MIL-SPEC compatible lower receiver. Featuring enhanced control surfaces, better ergonomics, lightweight engineering, and 8620 heat-treated cast steel construction.Note: Bolt catch roll pin, detent, and spring not included.Features: 8620 heat-treated steel Oversize control surfaces Raised T-shaped heel Compatible with Norgon ambi-catch Elegant tapered control surface Versatile modular design Horizontal and diagonal serrations Black Phosphate finish