The SIG P210 (Swiss Army designation Pistole 49) is a locked breech Semi-automatic pistol designed and manufactured in Neuhausen am Rheinfall (Canton of Schaffhausen, Switzerland) by Swiss Arms AG formerly SIG Arms AG. It is of all steel construction chambered in 9x19mm Parabellum and 7.65x22mm Parabellum. It was used from 1949 to 1975 by the Swiss army and police units. It was also adopted by the Royal Danish Army and in 1951 by the German Bundespolizei.The SIG P210 is a single-action pistol, with a magazine capacity of 8 rounds of 9 mm, 7.65 mm, or .22 Long Rifle (.22 LR). It has a frame-mounted manual safety that blocks the trigger and a magazine disconnecter safety that blocks the trigger when the magazine is removed. It has a 120 mm high quality barrel (npr 150 mm in the 210-5 variant) and the pistol is very durable and reliable. The slide and frame of this well-regarded weapon are completely machined from blocks of steel, which makes production rather costly compared to recent pistol designs, manufactured of pressings and welds. Its hammer action is built into a removable assembly for easy maintenance, and its slide rides inside the frame rails, rather than outside as in the traditional Browning pattern adding Swiss designer Charles Petter\'s SACM Modele 1935 pistolet system, allows for a very tight fit between the slide, barrel, and frame without compromising reliability. This construction feature contributes to the unusually high accuracy for which the SIG P210 is known. It ships with a 50-meter test target typically showing a group of 5 to 10 shots in a cluster under 5 cm in diameter.In 1937 SIG acquired a license for Petter\'s system, to develop a new self-loading pistol. Only after the Second World War, on the initiative of the Swiss army command, which would replace the Ordonnanzpistole Luger Parabellum 06/29, the development was ended. After testing various experimental models, the P210 as a standard model was delivered for the first time in 1949 to the Swiss army. Some previous series (original designation SP47/8) were tested by Swedish sport shooters and by the Danish army.There are a number of SIG P210 model variations.