JP Enterprises Gen 2 Enhanced 9mm AR Full Stroke Silent Captured Spring

The JP EnterprisesA(R) Gen 2 Enhanced 9mm AR Full Stroke Silent Captured Spring (SCS) is a buffer spring design that softens recoil and reduces cycling noise and vibration in your 9mm carbine. The result is a refined rifle that's a pleasure to shoot. Paired with JP Enterprises' 9mm bolt assembly, you have the most reliable 9mm operating system available. This silent captured spring is perfect for use with hotter ammunition. It's also the best pairing for use with non-JP bolt assemblies where a central mass needs to be removed. Removing this mass reduces the overall reliability of the operating system, which can be offset by the additional weight in the SCS. Because the insertion and removal of the Silent Captured Spring is very difficult with a standard buffer retainer pin, JP Enterprises recommends removing it when installing your SCS. This leaves the SCS "free-floating" in the buffer tube.