The CZ 457 American SR is a bolt-action .22 LR rifle with a 20-inch threaded barrel. The American SR variant has the American-style stock and suppressor-ready (SR) threaded muzzle. At 5.4 lbs. it's a manageable carry weight for field use or long range sessions. 
 

Key Specifications 

• Model: CZ 457 American SR 
• Caliber: .22 LR 
• Barrel Length: 20 inches 
• Capacity: 5 rounds 
• Weight: 5.4 lbs. 
• Finish: Black and Stainless Steel 
• Action Type: Bolt Action 
• Trigger Type: Adjustable 
   

Features 

 
The bolt runs smoothly and the action fit is tighter than most rimfire rifles at this price. The adjustable trigger is user-settable for pull weight. The threaded barrel takes suppressors and common muzzle devices; the muzzle thread is a standard size. An integrated dovetail rail handles scope mounting without additional hardware, though aftermarket Picatinny adapters are also available. 
 
The 457 platform is modular. Barrels and some stocks swap between 457 variants, which is useful if you want to try different configurations on the same action.

The CZ 457 American SR earns consistently good reviews for accuracy. Users report tight groupings with quality ammunition and describe the bolt as one of the smoother rimfire actions available. Build quality is a regular point of praise compared to cheaper .22 bolt rifles.

The threaded barrel is a popular feature for suppressor users and is frequently mentioned in positive context. The adjustable trigger, smooth bolt, and general ergonomics of the stock come up often in favorable terms. The platform's modularity is a selling point for users who want flexibility.

Criticisms mostly center on price. The 457 American SR costs more than many .22 bolt rifles, and some buyers on a budget note this. Magazine capacity of 5 rounds is also flagged by users who prefer higher-capacity options. Overall the rifle is well-regarded for precision rimfire work.