The J P Enterprises JP Enhanced 9mm AR Bolt is machined to the same exacting tolerances as our bolt carriers and represents a second generation design that eliminates the need for a central mass while remaining fully compatible with our JP Silent Captured Spring for 9mm operation. When paired with the JPSCS-9MM, this bolt assembly forms the heaviest, most reliable 9mm operating system available, dramatically reducing bolt bounce and boosting accuracy without sacrificing bolt weight. This .9 oz heavier design compared to the Rock River Arms 9mm bolt with its central mass removed translates into a smoother, more controlled firing impulse, especially when used in conjunction with the Silent Captured Spring, where the mass is shifted to the SCS to further stabilize cycling. Features include a reduced stroke length for faster firing impulse when used with JPSCS2-9MM, corrosion-resistant 416SS construction, a tighter firing pin channel to reduce pin wear, and a rock-hard nitride finish that provides excellent lubricity and a refined appearance. This JP Enhanced Bolt is designed for optimal function with AR-15 platforms and is ideal for shooters seeking enhanced reliability, smoother operation, and improved precision in 9mm builds.