The ProMag Ruger 57 magazine holds 20 rounds of 5.7x28mm ammunition and is designed specifically for the Ruger-57 pistol.
- Caliber: 5.7x28mm
- Capacity: 20 rounds
- Compatible Firearms: Ruger-57
- Material: Heat-treated blue steel body
- Finish: Blue steel
- Follower Type: Polymer
- Includes: (1) 20-round magazine
