RUGER MKIV 22LR TARGET STAINLESS 140MM - SKU: MKIV512S While the heavily redesigned Mark IV maintains the same classic outward appearance as the Mark III, it incorporates a significant improvement customers will love - a simple, one-button takedown for quick and easy field-stripping. 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. The bolt simply slides out of the receiver and the barrel can be properly cleaned from chamber to muzzle. "We are thrilled to be introducing what we consider to be a monumental improvement to this iconic pistol that has been with Ruger from the start," said Ruger President and COO Chris Killoy. "This one-button takedown alleviates the headache that our Mark III owners are all too familiar with and we anticipate the Mark IV pistols being some of the cleanest rimfires at the range," Killoy concluded. Other significant improvements include a one-piece grip frame that is precision CNC-machined from a solid piece of stainless steel or aluminium; an ambidextrous manual safety and a redesigned bolt stop for more ergonomic operation. The magazine drops free on release for faster reloads and a redesigned magazine disconnect safety prevents discharge when the magazine has been removed. Internal improvements include changes to the hammer, sear, bolt and firing pin for smoother, more reliable feeding. Specific features vary by model, but the legendary, one-piece barrelled receiver and internal cylindrical bolt construction remain the same. The robust design ensures permanent sight-to-barrel alignment and higher accuracy potential than conventional moving-slide designs. The Mark IV is compatible with a variety of Mark III after-market accessories including sights, scope bases and magazines. Features: Simple, one-button take-down 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. One-piece, precision CNC-machined grip frame. Ergonomic bolt stop. Smoothly contoured, comfortable grip features natural pointing grip angle with replaceable, checkered grip panels for a non-slip hold. 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-style scope base adapters for easy mounting of optics (rail not included). Ambidextrous manual safety positively locks the sear in the "SAFE" position when applied. 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. Specs: Barrel Length: 5.50" (140mm) Capacity: 10 Material: Stainless Steel Front Sight: Fixed Grip Frame: Stainless Steel Grips: Checkered Finish: Satin Stainless Rear Sight: Adjustable Barrel Style: Bull Grooves: 6 Twist: 1:16" RH Overall: Length 9.75" Weight: 42.3 oz.