Gen3 added the accessory rail and finger grooves to the full-size .45 ACP platform. Introduced the SF (Short Frame) sub-variant option. One of the most reliable .45 ACP pistols ever manufactured, the Gen3 G21 remains a popular range and duty pistol. Type: Semi-Automatic Pistol Action: Striker-Fired Caliber: .45 ACP Capacity: 13 Year introduced: 1998, Austria Weight: 26.28 oz Overall length: 7.59" Status: Discontinued Military use: Yes Intended use: service, law enforcement, military, duty