Built around the Walther award winning PPQ platform, the Q4 TAC features an optics ready slide that comes with a Trijicon RMR, Leupold Delta Point and Docter optic ready mounting plates in addition to the fiber optic front sights and standard LPA competition iron sights already included. Coupled with a threaded barrel, Walther signature ergonomics and quick defense trigger, the Q4 is the last word in firearm performance.