The P220 is SIG Sauer's original full-size service pistol, chambered in .45 ACP and built around a machined steel slide on an alloy frame. Introduced in 1975 as the Swiss Army P75, the P220 set the benchmark for DA/SA pistol reliability and was adopted by numerous military and law enforcement agencies worldwide. The single-stack magazine and de-cocking lever — no manual safety — defined the SIG operating system that would carry through the entire P-series lineup. Renowned for its accuracy, durability, and consistent trigger. Type: Pistol Action: DA/SA Caliber: .45 ACP Capacity: 8 Year introduced: 1975, Germany Weight: 30.4 oz Overall length: 7.7" Status: Active Military use: Yes Intended use: duty, military, law_enforcement, competition