Maintenance and field-stripping on the Ruger Mark IV Standard is quick and easy thanks to the one-button takedown design that allows the upper receiver to be removed without the use of any tools. Chambered in 22 LR the aluminum grip frame of this rimfired semi-automatic handgun is CNC-machined from a single piece while the grip is smoothly contoured and features replaceable stippled panels to ensure a firm non-slip hold. Other features of the Mark IV Standard include a tapered barrel ambidextrous manual safety that can easily be converted to left-side only and a magazine disconnect prevents discharge if the magazine has been removed. DetailsCaliber 22 LR - Capacity 10 - Material Alloy Steel - Front Sight Fixed - Barrel Length 4.40 - Grip Frame Aluminum - Grips Checkered Synthetic - Finish Black Oxide - Width 1.20 - Rear Sight Adjustable - Barrel Style Threaded - Weight 34.6 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. - One-piece precision CNC-machined grip frame. - Smoothly contoured comfortable grip features natural pointing grip angle with replaceable checkered grip panels for a non-slip hold. - Threaded barrel and top and bottom picatinny rails for attaching tactical accessories.