ISMI Recoil Spring for Smith & Wesson SD9 & SD40 VE 18lb

Note: Not compatible with Glock Guide Rods, using these springs with a Glock guide rod in your SD9 or SD40 will result in damage to your firearm. 

ISMI Premium Springs are manufactured exclusively with certified aerospace specification alloys; stainless or chrome silicon. Then their springs are heat treated, shot-peened and stress relieved after winding to enhance performance and durability. Chrome silicon springs have 10x the life of traditional music wire springs, and they hold much better tolerances during compression and cycling.

These springs utilize the same design and manufacturing technology as used in IndyCar and Formula One racing. In a typical 5 mile race, a valve spring in an IndyCar will go through more than 20,500 compression cycles. Consideration of factors such as modulus, wire diameter, mean diameter, active coils, total deflection, spring relaxation, maximum service temperature, and operating environment, results in you having modern spring technology available for your pistol.

See our complete line of Springfield SD9 & SD40 Products here

Note: NDZ always recommends any part be installed by a qualified and trained gunsmith. NDZ promotes the use of safety practices and gear when working on any firearm.