Designed with a 4.6-inch threaded barrel, the Walther PPQ M2 SD .22 LR Pistol also comes with a MIL-STD-1913 Picatinny rail for easy accessory attachment. The barrel and slide are coated in Tenifer, and the handgun has a Quick Defense trigger, 2 drop safeties, a firing pin block and a reversible magazine release button.