The Mark IV Tactical features a simple, one-button takedown for quick and easy field-stripping. Features contoured ejection port; Picatinny style rail top and bottom for easy mounting of optics; ambidextrous manual safety can be converted to left-side only with included washer; threaded barrel; conveniently located 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. Compatible with the Silent-SR sound suppressor. Includes two magazines.