Wilson Combat Flat-Wire Recoil Spring Kit, Black - 614

The longest lasting handgun recoil spring made - our testing has indicated that these springs have a service life up to ten times greater than conventional coil springs.Features:Improved recoil spring lifeRecoil spring guide machined from barstock1/4 inches rod diameter17# flat-wire recoil springCompatible with standard recoil spring plugCompatible with Shok-Buff recoil buffersRecommended use - full-size 5 inches 45 ACP shooting 230 grain hardball equivalent or standard pressure JHP self-defense ammunition with a power factor of 175,000 to 195,000Average service life - 40000 rounds