JP Enterprises EnhancedBolt 9mm AR Bolt Carrier Group (BCG)

JP Enterprises EnhancedBolt 9mm AR Bolt Carrier Group BCG. Machined to the same exacting tolerances as our bolt carriers, this third generation 9mm bolt assembly eliminates the need for a central mass to readily function with our 9mm JP Silent Captured Springs without compromising bolt weight and reliability. When used with our Silent Captured Spring, you have a reliable 9mm operating system that dramatically reduces bolt bounce while improving accuracy. New to this revision is compatibility with our line of short-stroke Silent Captured Springs. This bolt assembly will provide reliable last-round lockback with any compatible receiver such as our GMR-15 when you are running it with one of our JP Short Stroke 9MM Silent Captured Spring or standard stroke 9MM Silent Captured Spring. Specifications for JP Enterprises EnhancedBolt 9mm AR Bolt Carrier Group (BCG): Manufacturer: JP Enterprises Fabric/Material: 416R Stainless Steel Caliber: 9mm Luger