Glock 21

The Glock 21 is a full-size, polymer-framed semi-automatic pistol chambered in .45 ACP, introduced in 1991 alongside the Glock 20. It uses a larger frame to accommodate the .45 ACP cartridge while maintaining the Glock Safe Action system with a consistent trigger pull. The G21 features a 13-round magazine capacity, making it one of the highest-capacity .45 ACP pistols on the market. Its durable tenifer finish and reliable operation have made it popular among law enforcement agencies, military units, and civilian shooters. A short-frame variant, the G21SF, was introduced in 2007 to improve ergonomics for shooters with smaller hands.