The Mark IV has a simple one-button takedown for quick and easy field-stripping and proper chamber-to-muzzle cleaning. Features contoured ejection port and easy-to-grasp bolt ears; a drilled and tapped receiver for Weaver or Picatinny-style rail; ambidextrous manual safety can be converted to left-side only with included washer; push-button magazine release on the left side of the frame; 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. Includes two 10rd magazines.