Ruger's Mark IV™ 22/45™ features a 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. Its internal cylindrical bolt construction ensures permanent sight to barrel alignment and higher accuracy potential than conventional moving slide designs. The contoured ejection port and easy-to-grasp bolt ears allow for durable and reliable operation. Its sighting system features fixed sights and is drilled and tapped receiver for Weaver or Picatinny-style rail for easy mounting of optics. The Mark IV™ Standard also features a push-button magazine release on the left side of the frame, ambidextrous manual safety, and two 10-round magazines.