"The Springfield Armory 1911 Ronin 4.25"" AOS Semi-Auto Pistol with Gear Pac brings the beloved 1911 platform into the modern era with an advanced optics-mounting system, lighter weight, and factory-mounted optic. The slide features the Agency Optics System (AOS) slide cut that accommodates a wide variety of popular optics including the Trijicon RMR, Shield RMSc, Leupold DeltaPoint Pro, and Docter/Noblex. Each plate features an integrated rear sight that provides the ideal optic height and sight co-witness. Its forged alloy frame keeps the weight lower than the average commander 1911, making it an easier choice for everyday carry. The Ronin AOS features a 2-tone finish with forged carbon steel slide with beautiful hot salt bluing treatment. 4.25"" forged stainless steel, match-grade barrel. Crossed cannon wood laminate grips. Fiber-optic front sight, black serrated rear sight. Manual thumb safety and beavertail grip safety. Note: The 1911 Ronin 4.25"" AOS ships with a cover plate; additional plates are not included. This Gear Pac model includes a Viridian RFX11 Green Dot Optic, 4 magazines, and pistol bag. Agency Optics System optics-ready slide 4.25"" match-grade stainless steel barrel Forged alloy frame with Satin Aluminum Cerakote finish Carbon steel slide with hot salt blued finish Fiber optic front sight/black serrated rear Manual thumb safety and beavertail grip safety Wood laminate grips Gear Pac includes Viridian RFXII Green Dot Optic, 4 magazines, and pistol bag"