The Rock Standard full size Pistol built in traditional classic Series 70 design and delivered with our top quality production and engineering standard. Chambered in .45 ACP with 5 inches button rifled barrel. The slide has a Double Wide Slant Serration and with traditional Role Over Ejection Port. 4140 high grade Steel with Gun Metal Grey Cerakote Finish, Smooth, angled, snag free low profile Rear Sight allow for quick draw in fast need situation. Includes sketonize Hammer, Beavertail Grip Safety and Ambidextrous Safety Lock which is standard in the Rock Series. Grips are G10. Rock Island Armory Pistol, comes with crisp factory 4 to 6 lb trigger pull. Making it a great experience right out of the box.