The Tisas PX-5.7 OR is a semi-auto pistol chambered in 5.7x28mm with a 4.70-inch cold hammer forged barrel. It has a black polymer frame paired with a black QPQ-finished carbon steel slide that is cut for a red dot optic and serrated front and rear. The pistol ships with two 20-round magazines for a 20+1 capacity. 
 

Key Specifications 

• Brand: Tisas 
• Model: PX-5.7 OR 
• Caliber: 5.7x28mm 
• Action: Semi Auto 
• Capacity: 20+1 
• Barrel Length: 4.70 inches 
• Frame Material: Polymer 
• Slide Finish: Black QPQ 
   

Detailed Features 

• The optic-ready slide is cut for a red dot sight and carries front and rear serrations for manual racking. 
• The sight setup pairs a fiber optic front sight with a black serrated rear sight for fast target acquisition. 
• A firing pin block and trigger safety are built into the frame for drop-safe carry. 
• Polymer grips are integrated into the frame, which measures 1.38 inches wide. 
• Two 20-round magazines are included, giving the pistol a 20+1 capacity out of the box.

Shooters picking up the PX-5.7 OR generally find it runs the flatter-shooting 5.7x28mm round reliably once broken in, and most report the QPQ-finished slide resists holster wear better than a plain black oxide coating.

The polymer frame keeps the PX-5.7 light in the hand, and the optic-ready slide cut makes red dot mounting simple for owners who want one. A few shooters mention the factory sights sit low once an optic is added, so they pick up taller iron sights to co-witness.

Priced well below the pistols that popularized the 5.7x28mm cartridge, the PX-5.7 OR draws interest from buyers who want the round without the premium price tag. Magazine and ammunition availability for 5.7x28mm is more limited than mainstream calibers, which some owners weigh against the pistol's low cost.