In my experience THIS 13# Recoil spring produces less felt recoil, a faster, flatter sight track, and easy manipulation of slide without compromising reliability.
I recommend THIS 13# recoil spring for all 9mm ammo and bullet weights (including duty ammo and minor power factor ammo) in all of the following guns:
Note: this recoil spring has been extensively tested and works extremely well in all of the models listed above.
This spring will provide well over 50k rounds of reliable performance. That statement is based on my personal experience with these springs in a variety of pistols that have seen hard use and alot of miles!