The G21 Gen1 brought the Glock system to .45 ACP in a large-frame package. Wide grip accommodates the larger cartridge with a 13-round capacity — higher than any .45 ACP pistol then available. Gen1 examples feature no accessory rail and smooth frontstrap. Adopted by several US military special operations units. Type: Semi-Automatic Pistol Action: Striker-Fired Caliber: .45 ACP Capacity: 13 Year introduced: 1990, Austria Weight: 26.28 oz Overall length: 7.59" Status: Discontinued Military use: Yes Intended use: service, military, duty