ProMag Steel UZI Pistol Magazine .45 ACP 22-Round Black 22RD. The springs are precision wound using heat-treated chrome silicon wire. Bases and followers are injection molded from polymers selected for their durability. The result is quality consistency durability and reliability. Specifications for ProMag Steel UZI .45 ACP 22-Round Pistol Magazine: Manufacturer: ProMag Magazine Capacity: 22 Round Caliber: .45 ACP Gun Model: Uzi Condition: New Features of ProMag Steel UZI .45 ACP 22-Round Pistol Magazine Magazine body constructed of heat treated steel with black oxide finish Injection molded magazine follower Magazine spring formed from heat treated chrome silicone wire Package Contents: ProMag Steel UZI .45 ACP 22-Round Pistol Magazine What firearm models does the manufacturer say ProMag Steel UZI .45 ACP 22-Round Pistol Magazine is compatible with? The manufacturer suggests that ProMag Steel UZI .45 ACP 22-Round Pistol Magazine is compatible with UziProMag UZI-A1-22RD: Steel UZI Pistol Magazine .45 ACP 22-Round Black