Wilson Combat 178 Custom Tune Spring Kit - S&W K/L/N Frame Revolver

The Wilson Combat 178 Custom Tune Spring Kit is a drop-in action-tuning kit designed specifically for Smith & Wesson K, L, and N frame revolvers. Built from high-tensile spring wire, this kit allows shooters to easily smooth and lighten the factory trigger pull without a trip to a gunsmith.

The kit includes a reduced-power hammer spring along with three graded rebound trigger springs at 12 lb, 13 lb, and 14 lb pull weights, giving the user a range of options to dial in the exact feel they want. Simply swap the springs in place of the factory parts for an immediate improvement in trigger pull weight, reset, and overall action smoothness.

Wilson Combat has been a trusted name in precision 1911 and revolver components for decades, and the 178 spring kit continues that tradition of drop-in upgrades engineered for real-world use. All springs are constructed from durable steel for long service life and consistent performance.