The OP return springs for the Walther polymer-framed striker-fired pistols reduces trigger pull and break on an already incredible factory trigger. Made in the USA of high-tensile music wire, this proprietary spring will drop your break by up to 1lb (red) and 1/2LB (green).  Included in our trigger kits for Walther/Canik, 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, compatible with Canik models TP9 SF Elite, TP9 Elite Combat, TP9 Elite SC, TP9 SA, TP9 SF, METE SF, METE SF PRO, METE SFT, METE SFT PRO, METE SFX, METE SFX PRO, SFX Rival, SFX Rival-S