Designed by John Browning, the Model 1911 was the standard-issue side arm for the United States armed forces from 1911 to 1985 and is still carried by some U.S. forces today. The Model 1911's longevity is due to Browning's often-imitated design, which incorporates the short recoil principle. The M1911 is a single-action, semi-automatic, magazine-fed, and recoil-operated handgun chambered for the .45 ACP cartridge. Springfield's 1911A1 Loaded includes all the modern-day improvements that used to be performed only by custom gunsmiths. These features include: a precision-fit forged frame, slide, and barrel, front and rear cocking serrations, a flat serrated mainspring housing, a lowered and flared ejection port, and a delta lightweight hammer. Also standard is a loaded chamber indicator, a titanium firing pin, a dovetailed front sight, and a lightweight adjustable speed trigger. The Operator variant was one of the first pistols offered with a light-mounting rail forged directly into the frame, a standard Picatinny rail that accepts all the most popular tactical lights. This pistol features a rail-mounted Insight XML tactical light, 3-dot night sights, and 2-position and grip safeties and includes two 6-round magazines and the original factory hard case. Its grips, metal, and bore are all in very good condition.