Ed Brown 13 lb Flat-Wire Recoil Spring Fits Smith & Wesson M&P

The Ed Brown Fueled M&P recoil spring is built for M&P 4 inches, 4.25 inches and 5 inches models, providing an outstanding service life. Featuring a 15# recoil spring, it outlasts traditional coil springs by up to ten times, with recommended replacement intervals at 30,000-40,000 rounds to ensure peak performance.