The Ruger-57 Pro is a striker-fired semi-automatic pistol chambered in 5.7x28mm. It holds 20+1 rounds, has a 4.94-inch barrel, weighs 24.50 oz, and measures 8.65 inches overall. The frame is nylon with a black finish, the barrel is black nitride finished alloy steel, and the slide is alloy steel. 
 

Key Specifications 

• Brand: Ruger 
• Model: Ruger-57 Pro 
• Caliber: 5.7x28mm 
• Action Type: Striker Fire (Semi-Automatic) 
• Capacity: 20+1 rounds 
• Barrel Length: 4.94 inches 
• Overall Length: 8.65 inches 
• Weight: 24.50 oz (1.53 lbs) 
• Frame Material: Nylon with Black Finish 
• Sights: Fiber Optic Front & Adjustable Rear  
• Safety Features: Trigger, Firing Pin, Integral Locking System 
   

Features 

The 5.7x28mm cartridge produces high velocity with low recoil, making it easy to manage for extended range sessions or competitive shooting. A fiber optic front sight paired with an adjustable rear sight gives a clean sight picture and allows zero adjustment for different loads. 
 
At 24.50 oz the pistol carries light. The 20+1 capacity means fewer mag changes, which is an advantage in competition. The black nitride barrel finish resists wear and corrosion through regular use.

Owners of the Ruger-57 Pro highlight its lightweight build and low recoil as the gun's clearest selling points. The 20+1 capacity consistently draws positive remarks, and accuracy at the range is reported as good across many reviews.

The 5.7x28mm caliber has one notable downside that comes up often: ammunition costs more than common pistol calibers like 9mm, which affects how much people shoot it. Holster selection and aftermarket accessory availability are mentioned as being more limited than for mainstream pistol calibers.

A few owners have reported reliability issues with specific ammunition types after extended sessions. Trigger pull is considered acceptable by most but gets occasional requests for more customization options. The overall community view is positive, especially among shooters interested in the caliber specifically, with pricing and ammo cost as the recurring qualifications.