Colt Mfg O1070M45 M45AI Marine 1911 45 ACP 7+1 5" Stainless National Match Barrel, Brown Decobond Serrated Stainless Steel Slide & Frame w/Picatinny Rail, Desert Tan G10 Grip, Ambidextrous

The Colt Mfg O1070M45 M45AI Marine 1911 .45 ACP is a purpose-built duty and defensive sidearm engineered to the specifications of the United States Marine Corps. Designed for operators who demand reliability under extreme conditions, this full-size 1911 combines proven mechanical simplicity with modern ergonomic enhancements. The M45AI platform serves law enforcement, military personnel, and civilian shooters who prioritize stopping power, accuracy, and dependable performance in high-stakes environments where hesitation is not an option.

Built on a stainless steel frame and slide with a serrated top surface to reduce glare and enhance control, the M45AI features a National Match barrel that delivers exceptional accuracy and shot-to-shot consistency—critical for precision work at combat distances. The ambidextrous safety and slide stop accommodate left- and right-handed shooters with equal facility, eliminating training friction in teams. The 5-inch barrel balances velocity and maneuverability; paired with the .45 ACP round, it generates substantial kinetic energy while maintaining the legendary 1911 ergonomics and single-action trigger geometry that combat shooters trust. Desert Tan G10 grips provide superior grip texture even when wet, and the integrated Picatinny rail allows mounting of tactical lights or laser systems for low-light operations. The 7+1 magazine capacity (seven rounds plus one chambered) is standard for the platform and remains reliable across decades of proven field use.

This firearm is ideal for shooters who have trained extensively on the 1911 platform and demand a service-grade duty weapon with documented military heritage. Law enforcement officers, military personnel transitioning to civilian carry, and competitive pistol shooters benefit from the M45AI's robust construction and time-tested design. The rail-mounted system accommodates standard tactical accessories (SureFire, Streamlight, or equivalent compact duty lights), and the fixed sight configuration requires no zeroing—simply aim and fire. The stainless construction resists corrosion in marine and humid environments, making this platform exceptionally durable for coastal or tropical deployment. For those seeking a .45 ACP 1911 for sale, the O1070M45 represents the gold standard in duty-grade performance and reliability.