The Glock 17 was the first pistol designed and manufactured by the Austrian company Glock. It is a locked breech, short recoil 9 mm Parabellum semi-automatic pistol with a standard magazine capacity of 17 rounds of ammunition. It uses a modified Petter/Browning barrel locking system. The G17 showed up in the early 1980s for the Austrian Army weapons trials. It entered service under the designation P80. In 1988, it entered service in the Swedish Army under the designation Pistol 88. It is also used by the Norwegian Army and police. The designation 17 is derived from the gun's being Gaston Glock's 17th patent, rather than its magazine capacity. The Glock 17, like all Glock pistols, has a well known reputation for being extremely rugged and reliable.