MAIN SPRINGS & SEATS

Sig Sauer factory Mainspring (Hammer Spring) for P232, Newer P230, SP2009 and SP2340.

Sig Sauer factory mainspring seat for small (E2) grip. Fits P220 (*not compact version), P226, P229 & P225-A1.

Wolff Hammer Spring for the Sig Sauer P220 Serial #219166 and below.

• Also fits Browning BDA
• Factory Standard: 22LB
• Reduced Power: 18LB, 19LB, & 20LB

Factory replacement mainspring / hammer spring for SIG 1911 models.

From Grayguns, a Master Spring Set for Sig Sauer P-Series handguns. The P-MSS kit is an action upgrade package designed to reduce trigger pull weight while still providing reliable primer strikes. This set includes two mainsprings, one 17 lb. and one 19 lb., and a competition sear spring.

Fits the modern P-Series handguns with a DA/SA system, P220, P224, P225A1, P226, P227, P228, P229 and P-226 X-Five Allround.

Sig Sauer factory metal mainspring seat for the P239 9mm, P239 .40S&W and P239 .357SIG.

The Grayguns custom-designed Strut System fully supports the main spring, reducing friction, spring bowing and fatigue. The design eliminates the typical double action “crunch” felt in OEM pistols. This full system also includes our custom P-Series Master Spring Set, to help reduce your pull weight for full tuning options.

The SIG P-Series Fat Custom Strut System was designed by Bruce Gray to help bring another Grayguns custom gunsmithing service to the drop in parts market.

For more than 40 years Bruce has been modifying factory struts to eliminate the typical double action crunch caused by the sharp edges and tip of the strut.

In his new design, the fat strut fully supports the main spring which reduces friction, spring bowing, and fatigue. The struts are cut using a precision EDM process, hand finished, and heat treated to the proper hardness. Paired with the upgraded strut, is a durable seat machined in-house out of aircraft grade aluminum and anodized. These struts are indestructible and guaranteed for life.

This full system also includes our custom P-Series Master Spring Set, to help reduce your pull weight for full tuning options. Includes 17 pound spring (red) and 19 pound spring (blue).

Fit Guide

The system is compatible with the E2 style grips, as well as most older style grips. The system fits most of the following SIG DA/SA pistol variants:

• P226
• P228
• P229
• P225-A
• P227

Disclaimer

These parts are intended for installation by a qualified armorer or gunsmith. In some cases professional fitting will be required by a trained, qualified armorer/gunsmith who is very familiar with the pistol’s action.

Sig Sauer factory mainspring seat for the P245.

Sig Sauer factory Mainspring (Hammer Spring) for all caliber P225, P226, P228, P229 (old style) DA/SA and P239 models.

P220 above Serial # 219166

• Models without plastic retainer/base
• Factory Standard 24 LB

Sig P225, P226, P228 and P229

• Factory Standard 24 LB

Sig Sauer factory Mainspring (Hammer Spring) for all caliber P239 DAK models and P220 (old style) DA/SA.

Sig Sauer factory Mainspring (Hammer Spring) for all caliber P220, P226, and P229 DAK models.

Wolff Hammer Spring for the Sig Sauer P239

• Factory Standard: 18LB
• Reduced Power: 12LB, 14LB & 16LB

Sig Sauer factory Mainspring (Hammer Spring) for all caliber P227, P220, P226, P228, P229 (new style) and P245 DA/SA models.

Sig Sauer factory mainspring seat, new style. For use with short mainspring #34280454. Fits P220, P226, P228 and P229.

Wolff Hammer Spring for the Sig P220/P227/P226/P229 that use the black plastic mainspring seat. (Short Spring)

• Later Model Design
• Factory Standard 21LB
• Reduced Power 17LB, 18LB, & 19LB