The JP Enterprises 9mm Bolt Carrier Group is a short-stroke EnhancedBolt assembly designed to deliver a smoother, more reliable operating system for 9mm AR platforms. Engineered to work with JP’s 9mm Silent Captured Spring, it eliminates the need for a central mass while maintaining the bolt weight needed for dependable function. This setup helps reduce bolt bounce, improve accuracy, and support reliable last-round lockback in compatible receiver systems.