Standard 15-pound replacement for stock spring
Replacement flat wire spring for M&P® 4″, 4.25″ and 5″ models. The Ed Brown Fueled M&P models are equipped with 15# recoil spring as standard. The longest lasting handgun recoil spring made – up to ten times greater service life than a conventional coil spring.
Recommended spring replacement at 30,000-40,000 rounds.