Ruger Mark IV 250th Anniversary .22 LR 10+1 4.40" Stainless Threaded Bull Barrel, Black Alloy Steel Receiver w/Scope Rail, Black Polymer Frame, Checkered Synthetic Grip, RMR/RMSc/DPP Footprint, Ambidextrous The Mark IV 22/45 Limited Edition model features a special 'Made in the 250th Year of American Liberty" engraving on the barrel to commemorate America's 250th Anniversary. Featuring a one-button takedown for quick and easy field-stripping and proper chamber-to-muzzle cleaning. Pressing a button in the back of the frame allows the barrel-receiver assembly to tilt up and off the grip frame without the use of tools; precision-molded polymer grip frame with a serrated front strap and checkered backstrap; cold hammer-forged, threaded barrel with thread protector; ergonomic bolt stop; checkered, 1911-style grip panels; contoured ejection port and easy-to-grasp bolt ears allow for durable and reliable operation; factory-installed scope mount for direct optic mounting of RMR, DPP and RMSc pattern optics; ambidextrous manual safety can be converted to left-side only with included washer; push-button magazine release on the left side of the frame; magazine disconnect prevents discharge when the magazine has been removed. Includes two 10rd magazines.