Overwatch Precision 4.4 LB Trigger Return Spring for Walther SF/Polymer Pistols Green. made in specialized factories of high-tensile music wire this proprietary spring will drop your break by up to 1lb (red) and 1/2LB (green). Included in Overwatch Precision trigger kits for Walther grab a few extra for the range bag or upgrade your existing blaster. As always it is covered by Overwatch's lifetime warranty and fits the PPQ Q4 TAC Q4/Q5 SF and the new PDP series of Walther pistols. Specifications for Overwatch Precision 4.4 LB Walther Return Spring: Manufacturer: Overwatch Precision Color: Green Fabric/Material: Polymer Gun Make: Walther Gun Model: Walther PDP Walther PPQ Package Contents: Overwatch Precision 4.4 LB Walther Return Spring What firearm models does the manufacturer say Overwatch Precision 4.4 LB Walther Return Spring is compatible with? The manufacturer suggests that Overwatch Precision 4.4 LB Walther Return Spring is compatible with Walther PPQ Walther PDPOverwatch Precision 6001: 4.4 LB Trigger Return Spring for Walther SF/Polymer Pistols Green