The Springfield Armory 1911 Ronin 4.25" AOS 9mm blends classic two-tone tactical elegance with modern, optics-ready versatility. Built into a highly portable Commander-length configuration, this model is built around a lightweight forged aluminum alloy frame treated with satin aluminum Cerakote® to significantly drop carrying weight without sacrificing structural longevity. The defining feature of the PX9117LAOS layout is the integration of the Agency Optic System (AOS), a premier slide-milled footprint co-developed with Agency Arms that uses custom adapter plates to seat micro red dots deep into the slide for natural co-witnessing. Housing a 4.25-inch match-grade forged stainless steel barrel and a crisp, competition-grade single-action trigger break, it finishes its distinct profile using high-contrast fiber optic front sights and classic hybrid checkered wood laminate grips. Springfield Armory 1911 Ronin 9mm 4.25" Bbl Blued/Stainless Handgun w/ AOS Plate, U-Notch Fiber Optic Sights, 1x9rd Mag PX9117LAOS