Pro Mag Industries Magazine for Tisas PX-57 Features The ProMag magazine for the Tisas PX-57 is formed from heat-treated steel and finished in a protective black oxide coating a combination engineered to resist wear and corrosion while standing up to the daily grind of a working magazine. Inside an injection-molded follower guides each 5.7x28mm round smoothly and consistently toward the feed lips helping prevent misfeeds during rapid strings of fire. The magazine spring is built from heat-treated chrome silicone wire a material chosen for lasting resilient tension that holds up over thousands of compression cycles rather than weakening prematurely. Because the magazine is dimensioned specifically for the PX 5.7 platform it drops in locks up and feeds the same way the factory magazine does giving owners a seamless backup option. The 20-round capacity matches the intended magazine layout of the PX 5.7 delivering consistent stack pressure and reliable cartridge presentation to the chamber shot after shot. For a high-round-count caliber like 5.7x28mm having extra full-capacity magazines on hand keeps shooters in the fight rather than stopping to reload mid-session. This magazine is proudly made in the USA reflecting a commitment to domestic manufacturing quality that many imported alternatives cannot match. For Tisas PX 5.7 owners building out a range bag or training rotation this ProMag magazine delivers dependable full-capacity feeding in a rugged steel package built to last. Pro Mag Industries Magazine for Tisas PX-57 Specifications Manufacturer: Pro Mag Industries Model: Magazine for Tisas PX-57 Compatible Hosts: Tisas PX 5.7 Caliber: 5.7x28mm Capacity: 20 Rounds Body Material: Heat-Treated Steel Black Oxide Finish Follower: Injection-Molded Spring: Heat-Treated Chrome Silicone Wire Country of Origin: USA Objective Lens: 28 mm Available At: GrabAGun