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The Weihrauch HW 45 is an air pistol manufactured by Weihrauch & Weihrauch. It is more commonly known in North America as the Beeman P-1.
The Pistol is described as a sporter and is available in three different calibres: .177, .20 and .22. The HW 45 is used for target shooting, plinking and dispatching small game. Its design is based on the cartridge pistol M1911, except that it has a greatly enlarged slide to accommodate the powerplant.
The HW 45 has a self-contained powerplant in the form of a compressed spring. The compression is achieved via an over arm cocking lever incorporated into the barrel. The HW 45 features a Precision adjustable two stage trigger and a micrometer rear sight adjustable for windage and elevation. There is also a grooved dovetail rail for accessories.