Staff Writer (Updated: 9/27/2016):
Other Glock 17 models in the family included the Model 17L of 1996 (which featured and increased barrel length) and the Model 17C of 1988 (which featured a muzzle compensator to assist in accurized shooting). The Glock 17MB was fitted with an ambidextrous magazine catch. The Glock 17T was produced as a training pistol to fire rubber or paint bullets. It was produced in two versions known as the Glock 17T 9mm FX and the Glock 17T 7.8x21 AC - these designations denoting the types of cartridges each version could fire. The Glock 17P was another training model to be utilized in close-in, hand-to-hand fighting education.
The Austrian military designated the Glock 17 as the "Pistole 80" while Norway took to naming the firearm as the "P-80". Sweden handled the Glock 17 as the "Pistol 88". The Glock 17A was made for the Australian market, falling within its new firearm regulations. The Glock 17S was delivered to Tasmania, Israel and Pakistan as well as operators in South America. The Glock 17Pro was a customized form sold only to Finland. The Glock 17DK was a Glock product developed specifically for Denmark.
Historically there were no Glock 1 through Glock 16 models. The Glock 17 model number is derived from the product being the company's seventeenth patent. The model is the most widely-used law enforcement pistol in the world and has been favored by some special forces units including Polish JW Grom and Israeli Shayetet 13.