The Ruger Mark IV 22/45 Tactical employs all of the favored features of the Mark IV series including the tool-free one-button takedown for quick and easy field-stripping and cleaning as well as top and bottom Picatinny rails and a threaded barrel. This semi-automatic rimfire pistol is chambered in 22 LR and has an alloy steel receiver and polymer-framed 1911-style stippled grip. Other features include an ambidextrous manual safety and magazine disconnect that prevents discharge while the magazine is released. The Mark IV 2245 Tactical has an anodized black finish and comes with a 10-round magazine. DetailsCaliber 22 LR - Capacity 10 - Receiver Material Alloy Steel - Front Sight Fixed - Barrel Length 4.40 - Grip Frame Polymer - Grips Checkered 1911-Style - Finish Black Oxide - Width 1.22 - Rear Sight Adjustable - Barrel Style Threaded - Thread Pattern 12-28 - Weight 33.3 oz. - Overall Length 8.50 - Height 5.50 - Grooves 6 - Twist 116 RH - Simple one-button takedown for quick and easy field-stripping and proper chamber to muzzle cleaning. - A recessed button in the back of the frame allows the upper receiver to tilt up and off of the grip frame without the use of tools. - Ergonomic bolt stop. - Internal cylindrical bolt construction ensures permanent sight to barrel alignment and higher accuracy potential than conventional moving slide designs. - Contoured ejection port and easy-to-grasp bolt ears allow for durable and reliable operation round after round. - Accurate sighting system features adjustable rear sight and drilled and tapped receiver for Weaver- or Picatinny-style rail for easy mounting of optics. - Ambidextrous manual safety positively locks the sear in the SAFE position when applied. Safety can be converted to left-side only with included washer. - Features a conveniently located push-button magazine release on the left side of the frame. - Magazine drops free on release for faster reloading. - Magazine disconnect prevents discharge when the magazine has been removed. - Also includes two 10-round magazines. - Threaded barrel and top and bottom picatinny rails for attaching tactical accessories.