Rock Island Armory 51623: ROCK Island ARMORYrock Ultra FSa Full-Size frame a Parkerized finisha Full-length guide rod a Dovetail-mounted Fiber-Optic front sight a LPA MPS1-Type adjustable rear sight a Narrow rear slide serrations a Black/Gray textured G10 grips a Ambidextrous safety a OAL: 8.75" ROCK Series Common SPECSa Traditional 70 series design with the addition of next level upgrades a Smooth angled snag-free style a Crisp 4-6 lb. factory trigger a Extended Beavertail a Combat hammer a Combat trigger with adjustable over travel stop ROCK Island 1911 OVERVIEWa Built to true Series 70 design a Semi-Auto recoil operated a Built using 4140 Ordnance steel & engineered using the latest CNC machines a Hand-fitted & confirmed to meet strict tolerance & quality requirements in tightness smoothness including overall look & feel a 4140 steel frame & slide a Button rifled barrel