The PPQ M2 Q4 TAC is a double-action-only, striker-fired semi-automatic with a Browning-type tilt barrel. The M2 in the name indicates this pistol has a reversible round push-button type magazine release instead of the ambidextrous lever found on previous models. The Q4 stands for the 4" slide and TAC is, of course, short for Tactical. 

The slide is treated with the same durable matte black Tenifer finish as the barrel and internal components. It features front and rear cocking serrations, an enlarged ejection port and a grooved topstrap for reduced glare. The red fiber optic of the front sight is supported in a metallic housing with a square profile to match the notch of the fully adjustable rear sight. The rear sight is mounted directly into the removable filler plate that covers the section of slide that has been milled, drilled and tapped to accept an optic. Three additional slide plates are provided for attaching Trijicon RMR, Leupold Delta Point and Doctor brand optic

The 4.6" polygonally-rifled barrel is threaded at 1/2 x 28 TPI for suppressors and other barrel accessories. A thread protector is provided. The standard spring weight recoil assembly consists of a polymer guide rod with a captured flat wire spring. Another recoil assembly, tuned for use with sound suppressors, is shipped with the pistol.

The black polymer frame's dust cover features a molded in 1.5" Picatinny accessory rail. The generous trigger guard is undercut for improved comfort with a textured finger rest along the front edge. Above the trigger is the takedown lever and the mounting point for the extended, low-profile ambidextrous slide stop. The polymer Quick Defense trigger sports an integrated safety lever with a listed trigger pull weight of 5.6 lbs. The pistol I worked with had a lighter trigger that weighed in at 4 lbs. 10 oz.