What's in the Box Ruger Mark IV 22/45 22LR Rimfire Pistol with Threaded Barrel (2) 10 Round Magazines Gun Lock The Ruger Mark IV 22/45 Pistol (Model 40190) is the ultimate .22 LR handgun for sport shooting, plinking, and target practice. Engineered for shooters of all experience levels, this semi-automatic pistol combines classic 1911 styling with modern polymer frame innovation, delivering comfort, durability, and consistent accuracy round after round. Firearm Features Simple One-Button Takedown: Effortlessly field-strip the pistol without tools just press the rear frame button and tilt the barrel/receiver assembly up and off the grip frame for fast, thorough cleaning and maintenance. Threaded Bull Barrel: 4.40" cold hammer-forged, 1/2"-28 barrel with thread protector allows easy attachment of popular muzzle accessories (suppressors, compensators), enhancing versatility on the range. Precision Polymer Grip Frame: Ergonomic, molded polymer frame with serrated frontstrap and checkered backstrap ensures a secure, non-slip hold in any condition. Checkered 1911-style synthetic grip panels add both style and stability. Adjustable Rear Sight & Picatinny Rail: Fine-tune your point of aim with the adjustable rear sight, and mount red-dot optics or tactical lights instantly on the factory-installed Picatinny rail for rapid target acquisition. Reliability & Accuracy: Internal cylindrical bolt construction maintains permanent sight-to-barrel alignment for superior accuracy potential, while the contoured ejection port and robust bolt ears guarantee smooth, reliable cycling. User-Friendly Controls: Ambidextrous manual safety (convertible to left-side only), convenient push-button magazine release, and magazine disconnect safety feature provide secure, intuitive operation. Firearm Specifications Model Number: 40190 Caliber: 22 LR Capacity: 10+1 Receiver Material: Alloy Steel Front Sight: Fixed Barrel Length: 4.40" Grip Frame: Polymer Grips: Checkered Synthetic Finish: Blued Width: 1.22" Rear Sight: Adjustable Barrel Style: Threaded Bull Weight: 33.3 oz. Overall Length: 8.50" Height: 5.50" Grooves: 6 Twist: 1:16" RH Available in CA: No Available in MA: No UPC: 7-36676-40190-1