The AIP enhanced recoil spring increases recoil and cycle rate in any Gas Blowback Hicapa or 1911, including WE, KJW, and TM gas pistols. This allows for more rapid-fire shooting and crisper recoil.
This part from AIP is designed to operate on almost any gas pistol, and produces excellent results in all model 1911 and Hi-Capa pistols. The stiffer spring installs along with the original recoil spring. This causes the slide to return to battery faster, allowing for faster shooting and increased felt recoil. Since it installs without tools and without any modification, it's an easy upgrade to drop into any compatible pistol.