Kaw Valley Precision Pistol Caliber Carbine XP Recoil Spring 17-4 Stainless Steel

The Kaw Valley Precision Pistol Caliber Carbine XP Recoil Spring is an extra-power buffer spring purpose-built for direct-blowback AR-platform pistol caliber carbines and .308 blowback builds. It is machined from 17-4 stainless steel for consistent cycling and long service life under the heavy bolt velocities of blowback operation.

The XP spring delivers increased pre-load over a standard carbine buffer spring, which translates into longer dwell time in direct-blowback setups, more reliable cycling of heavier bolt and buffer combinations, and noticeably reduced felt recoil at the shoulder. It is designed to drop into a carbine-length buffer tube or pistol buffer tube on AR-15-pattern lower receivers as a direct upgrade over a stock spring.

Optimized for the most popular pistol-caliber blowback chamberings, this spring is suitable for 9mm Luger, 10mm, .40 S&W, and .45 ACP PCC builds, as well as .308 blowback AR platforms. If you are running a heavier bolt or an aftermarket buffer in a blowback AR, the XP spring helps keep everything cycling smoothly.

Kaw Valley Precision focuses on practical, purpose-built components for the AR-15 and pistol-caliber carbine market, and this XP recoil spring is a simple, proven upgrade for any blowback AR build.