Harrison Design now carries Wolff recoil springs for your convenience. We offer the Wolff Conventional rate springs so you have an even compression rate as the slide travels rearward. You also get a stiffer initial opening rate from "in battery", which works along with a standard power firing pin sring and a small radius firing pin stop to slow the slide's opening. Available in the common weight rates and comes with an extra power firing pin retun spring.
For Commander (4 1/4" barrel length) pistols
Suggested applications -
20# - .45 ACP extra power ammo
18# - .45 ACP standard mil-spec 230 ball equivalent
16# - .45 ACP reduced power ammo
14# - 9x19 & .38 Super full power ammo
12# - 9x19 & .38 Super reduced power ammo