Ruger Mark III / IV Magazine

Features

1. Factory OEM Ruger Magazine — Genuine Sturm, Ruger & Co. production magazine built to original spec for guaranteed fit and function.
2. 10-Round .22 LR Capacity — Full 10-round capacity in .22 Long Rifle, matching the standard configuration for Mark III and Mark IV rimfire pistols.
3. E-Nickel Steel Body — Electroless nickel-plated steel body resists corrosion and feeds smoothly cycle after cycle.
4. Polymer Follower — Durable molded polymer follower delivers consistent feeding and reduces friction inside the magazine body.
5. Steel Wire Spring — Heavy-duty steel spring maintains reliable tension across thousands of rounds of rimfire use.
6. Side Reloading Button — Integrated thumb button on the side of the body lets you pull the follower down for fast, finger-saving reloads.
7. Polymer Base Plate — Tough polymer base plate seats cleanly in the magwell and protects the magazine from drop damage.
8. Fits Mark III & Mark IV Pistols — Drops into standard-frame Ruger Mark III and Mark IV .22 LR pistols straight from the box.
9. Not Compatible With 22/45 Models — This magazine does not fit any Ruger 22/45 variants; use the dedicated 22/45 magazine for those frames.
10. Ruger Part #90231 — Factory part number 90231, the same magazine Ruger ships with the pistol from the factory.