ProMag builds this magazine (part no. RUG-A42) as a replacement or spare for the Ruger-57, chambered in 5.7x28mm. The body is finished in blue steel and holds a full 20 rounds, matching the pistol’s standard factory capacity. For ProMag owners running a Ruger-57, this handgun magazine is a direct-fit spare.

Key Specifications

• Chambered in 5.7x28mm.
• Holds 20 rounds.
• Fits the Ruger-57.
• Built from blued steel.
• A detachable magazine, dropping free for fast reloads.
• Classified by the manufacturer as a Magazine.
• Weighs approximately 0.23 lb as shipped.

Frequently Asked Questions

What pistol does this fit? The Ruger-57, chambered in 5.7x28mm.

How many rounds does it hold? 20 rounds, matching the pistol’s standard factory capacity.

Buy the ProMag Ruger-57 20-Round Magazine

A blued-steel factory-pattern spare, this ProMag magazine is a reliable backup for your Ruger-57. Order it from our Lubbock, Texas gun shop for fast, insured shipping.