Tier5™ Solutions LLC has developed an innovative new product for the AR platform, the MBC™ (Modified Bolt Catch). A Drop-In Modification that will fit all Mil-Spec AR platform. It converts the mechanical operation from semiautomatic/auto-loading/self-loading to single shot/manual loading. Excellent for training shooters of all experience levels that are new to the AR firearm. Follow us on several social media (Instagram, Facebook and Tumblr) for more information as we get closer to the release date of July 2017.