Wilson Combat Full-Size Flat-Wire Recoil Spring, 17 lb, Chrome Silicone - 614G17

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:Full-Size 5 inches 45 ACP shooting 230 grain hardball equivalent or standard pressure JHP self-defense ammunition with a power factor of 175000 to 195000Average service life - 40000 roundsImproved recoil spring lifeCompatible with standard recoil spring plugCompatible with Shok-Buff recoil buffers