This Spring Pak contains one each of 2-1/2, 3 and 3-1/2 lb reduced power trigger return springs to allow varying adjustment of the trigger. Works for all S&W semi-automatics except model 52-2 and Sigma series.
Features: Reduced power trigger return spring
(draw bar plunge spring) for lighter trigger pull
Gunsmithing Required: Replaces factory spring
Notes: Includes 3 different springs to help improve double-action trigger performance
Works well with reduced power hammer springs
1 each of 2.5, 3.0, 3.5 lb springs, factory spring is 4 lb
Fits S&W centerfire autos in 9mm, 10mm, 40 S&W and 45ACP
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