The Ruger Mark IV 22/45 Lite is a semi-automatic rimfire pistol chambered in .22 LR with a 4.4-inch threaded barrel and 10-round capacity. It has a champagne anodized serrated slide, a Picatinny rail, and a black anodized polymer frame with checkered grips. The barrel is threaded for suppressor use. 
 

Key Specifications 

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

Detailed Features 

• 4.4-inch stainless threaded barrel 
• Champagne anodized serrated slide 
• Picatinny rail for optics or accessories 
• Black anodized polymer frame 
• Checkered 1911-style grip

Owners of the Ruger Mark IV 22/45 Lite regularly comment on the takedown system, which is a major improvement over earlier Mark series pistols and makes cleaning straightforward. The threaded barrel is a frequently cited reason for choosing this variant specifically.

The champagne slide finish is polarizing: some owners consider it a clean, distinctive look; others prefer the all-black version. Feed reliability with quality .22 LR ammunition is generally reported as good, though most owners note the pistol is ammunition-sensitive and dislikes bulk-pack rounds.

The 10-round capacity suits most range sessions, and the Picatinny rail makes it easy to add a red dot. Trigger feel on the Mark IV 22/45 Lite gets mostly positive reviews, though a small number of shooters find the reset longer than expected for a target-oriented pistol.