Wolff Gunsprings is a manufacturer of precision springs for firearms.Our proprietary spring material and processes provide you with high quality, reliability and proven performance not found with most other springs. With nearly 60 years of experience exclusively with firearm springs, you can be assured that when you choose a Wolff spring, you are choosing the best!
Colt CAR-15, M4, & 9mm SMG action springs available in reduced power, factory standard, and extra power.
Fits
Model (reduced power): 16502
Model (standard): 16503
Model (extra power):16501
