The Ruger Mark IV 22/45 is a semi-automatic pistol chambered in .22 LR with a 4.4-inch threaded barrel and a 10-round capacity. It has polymer grips and a black finish. The 22/45 variant uses a grip angle similar to the 1911 platform pattern. 
 

Key Specifications 

• Brand: Ruger 
• Model: Mark IV 22/45 
• Caliber: .22 LR 
• Action: Semi Auto 
• Capacity: 10+1 rounds 
• Barrel Length: 4.4 inches 
• Color/Finish: Black 
   

Detailed Features 

• 4.4-inch threaded barrel 
• 10+1 round capacity 
• Polymer grips 
• Black finish throughout

Owners of the Ruger Mark IV 22/45 consistently point to the disassembly system as a major practical improvement over earlier Mark series pistols. A single button release makes takedown and cleaning far quicker, and that convenience comes up in almost every long-term owner review. The threaded barrel on the Tactical variant is popular with those who add suppressors.

Reliability with a range of .22 LR ammunition gets good marks overall. Most owners find the Mark IV cycles common bulk ammunition without issue, though a break-in period is a common recommendation before expecting flawless feeding. The trigger is considered decent for a rimfire pistol, though owners who have also used the non-22/45 version note minor differences in feel.

The polymer grip frame keeps weight down and is appreciated by those who use it for extended range sessions or small-game use. A segment of owners prefer the all-metal feel of the standard Mark IV grip, so the 22/45 version splits opinion on ergonomics. Overall, the Mark IV 22/45 is seen as a practical rimfire that punches above its price class for training and general use.

Soft recoil makes this an easy, enjoyable pistol for teaching and practice.