Description
The Ruger Mark IV 22/45 is a rimfire semi-automatic pistol designed for accurate range work and recreational target shooting. This variant features a 5.50-inch bull barrel and a blued finish on the slide and receiver. The pistol uses a polymer grip frame with checkered synthetic panels and ships with two 10-round magazines. The receiver is drilled and tapped to accept Weaver- or Picatinny-style optics for straightforward sighting upgrades.
Key Specifications
- The caliber is .22 LR.
- The barrel length is 5.50 inches with a bull profile.
- The magazine capacity is 10 rounds and the package includes two magazines.
- The finish on the slide and receiver is blued.
- The grip frame is polymer with checkered synthetic grip panels.
- The overall length is 9.75 inches and the unloaded weight is approximately 34.4 oz.
- The receiver is drilled and tapped for optics and the pistol features an adjustable rear sight.
- The barrel rifling is 6 grooves with a 1:16″ RH twist rate.
- The action is a semi-automatic rimfire design intended for range and training use.
- The pistol includes a magazine disconnect and a simple one-button takedown for quick field-stripping.
Well-suited for precision practice, training, and casual target work, the Mark IV 22/45 pairs a stabilized bull barrel with a receiver ready for optics and a user-friendly takedown system. Its combination of an optic-ready platform, manageable .22 LR recoil, and included magazines makes it a practical choice for shooters who prioritize consistent sight-to-barrel alignment and straightforward maintenance.





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