Rock Island Armory 51868 : The Rock Standard compact size pistol built in traditional classic Series 70 design and delivered with our top quality production and engineering standard. Chambered in .45 ACP with 3.63\" button rifled barrel. The slide has a rear slant serration and with traditional roll over ejection port. Slide and frame are stainless and all exposed parts are matted chrome SAE 4140 high grade steel. Front/rear sight and internal parts are parkerized finish. Smooth, angled, snag free low profile rear sight allow for quick draw in fast need situation. Includes skeletonized hammer, Beavertail grip safety and conventional safety lock. Grip is a double diamond checkered wood. Rock Island Armory Pistol, comes with crisp factory 4 to 6 pound trigger pull.