The Seekins Precision Enhanced Bolt Catch is an easy to install upgrade that improves the functionality of any Mil-Spec lower receiver. Designed to make bolt manipulation easier, the unique, oversized bolt catch has an aggressive, diamond texture for positive operation. The bottom portion of the catch is also larger and diamond textured, greatly assisting the operation of locking the bolt back. Manufactured using metal injected molding (MIM) process allowing the selection of a proprietary material that is considerably stronger than our original billet model or a factory Mil-Spec Bolt catch.Please NOTE: This product has been changed from our original billet model to metal injection molding product. Coating has also been changed from Melonite to our new ArmorBlak coating. Unlike Melonite, the ArmorBlak coating does not affect the heat treatment of the part thus providing less visible wear and greater strength. Not compatible with AR-10 platform.