The HK P30 is a German semi-automatic, double-action pistol chambered either for 9x19mm Parabellum or 10x22mm S&W (.40SW) cartridges. It was introduced in 2006 by Heckler & Koch and is used by some law enforcement agencies and elite army units. Its self-loading system uses a recoil action, with modified Browning locking system, and it is fed from a 15-round detachable magazine. Light and compact, its frame is made of polymer, but the slide and the 9.3-cm-long barrel are steel. It is fitted with 3-dot iron sights, featuring ambidextrous slide lock and magazine release. This German sidearm has no safety switch but a decocker, which is a mechanism that allows to release the spring tension on the cock hammer; the decocker prevents the hammer from reaching the firing pin and firing the gun, being activated by pushing down a button at the top. The HK P30 comes with two interchangeable backstraps and handgrip panels, and two magazines. It has an effective range of 50 m and a muzzle velocity of 380 m/s.