Ruger Mark IV 22/45 Collector's Series, Semi-automatic Pistol, Polymer Frame, Single Action Only, 22 LR, 5.5 Barrel, 1/2X28 Thread Pitch, Blued Finish, Black, Engraved American Walnut Grips, Ambidextrous Safety, 10 Rounds, 2 Magazines, 2025 Collector's Series Metal License Plate, Decal and Lapel Pin 40192 The Ruger Mark IV 22/45 has a simple, one-button takedown for quick and easy field-stripping and proper chamber-to-muzzle cleaning. Pressing a button at the back of the frame allows the barrel-receiver assembly to tilt up and off the grip frame without any tools. The cold hammer-forged barrel provides highly precise rifling that ensures exceptional accuracy and durability.