The Ruger Mark IV 22/45 Precision is a semi-automatic .22 LR pistol with a 5.5-inch bull barrel, 10+1 capacity, blued finish, and checkered synthetic grip. Weight is 2.1 lbs (34.4 oz). The Mark IV series introduced one-button takedown, a significant improvement over earlier Mark pistols that required a procedure many shooters found frustrating. The fixed front and adjustable rear sights cover most shooting situations without modification. 
 

Key Specifications: 

• Caliber: .22 LR 
• Action: Semi-Automatic 
• Capacity: 10+1 rounds 
• Barrel Length: 5.5 inches 
• Weight: 2.1 lbs (34.4 oz) 
• Finish: Blued 
• Grip Material: Checkered Synthetic 
   

Detailed Features: 

• Lightweight Design: At 2.1 lbs it's comfortable to hold through extended sessions without fatigue. 
• 5.5-inch Bull Barrel: The bull barrel profile adds weight up front which stabilizes the muzzle and helps manage the already-light .22 LR recoil. Groups tighten up as a result. 
• Ambidextrous Manual Safety: Accessible from either side, which works for left-handed shooters and mirrors the 1911 grip angle the 22/45 frame is designed around. 
• Fixed Front / Adjustable Rear Sights: The adjustable rear lets you dial in windage and elevation to match your preferred ammunition.

The Ruger Mark IV 22/45 Precision is well-regarded among .22 LR shooters, and discussions around it focus on a few consistent themes.

Accuracy is the most frequently cited strength. Owners report tight groups at typical pistol distances, which makes the pistol useful for precision practice, steel challenge, and general target shooting. The bull barrel profile gets credit for this.

One-button takedown comes up in almost every ownership discussion. It's the clearest generational improvement over earlier Mark series pistols, and owners at all experience levels appreciate how much easier cleaning became.

The 22/45 grip angle draws specific interest from 1911 shooters. It's a deliberate match to the 1911 grip geometry, and owners who use both platforms find the transition seamless.

Ammunition sensitivity is a real topic. The Mark IV handles quality .22 LR reliably; some bulk ammunition types cause more cycling issues. This is typical for rimfire pistols generally, not a unique flaw.

Aftermarket support is broad. Optic mounts, replacement grips, and trigger upgrades are widely available, and owners who want to customize have a lot of options.

Pricing discussions are generally favorable, though a few shooters compare it against competing .22 pistols and note the Ruger carries a slight premium that most consider justified by the feature set and brand reliability.