The Glock 37 is a version of the Glock 17 designed to fire the .45 G.A.P. cartridge. The .45 G.A.P. pistol cartridge was designed at the request of firearms manufacturer Glock to provide a cartridge that would equal the power of the .45 ACP, have a stronger case head to reduce the possibility of case neck blowouts, and shorter to fit in a more compact handgun. G.A.P. is an initialism for "Glock Automatic Pistol", and the .45 G.A.P. is the first commercially introduced cartridge identified with Glock. The Model 37 is a single action, semi -automatic with the matte finish and alloy frame with white dot front sight and wind drip white outline rear. Gun remains in near new condition inside and out and comes in the original carry case with three magazines and tools. Serial Number-FUD216; Manufacturer-Glock; Model-37; Caliber-.45 G.A.P.; Barrel Length-4-1/2"; FFL Status-Modern;