Ruger Mk I, II, III Pistol Performance Pak $29.97 Contains 1 each extra power recoil spring, firing pin spring, reduced power hammer spring and a reduced power trigger spring for improved performance. 30380 Out of stock Categories: Ruger, Wolff Gun Springs Related products Walther P-38, P1, P5 XP magazine springs 3 pak $34.97 Colt Officer Conventional Recoil Spring 24lb. $14.97