RUGER MAGAZINE 22/45 MKIV 22LR 10 SHOT

The Ruger Magazine 22/45 MKIV is a factory 10-round rimfire feed unit built for the .22 LR pistols that made Ruger’s rimfire line a range-day staple. Machined and finished by Ruger, it drops into your Mark IV, 22/45, and Mark IV 22/45 Lite with the same fit and feel you expect from an original part. If you shoot a lot of .22, spare magazines are never a bad idea. This one keeps your gun running through bricks of ammunition without a hitch.

What the Ruger Magazine 22/45 MKIV Is and Who It Is For

This is a genuine 10-round, .22 caliber magazine engineered specifically for the Ruger Mark IV family. It is the same magazine that ships with the pistol from the factory, so there is no guesswork about fit, reliability, or feed geometry. Plinkers, small game hunters, and competitive rimfire shooters all benefit from keeping a few extras on the bench.

Rimfire training burns through ammunition fast, and reloading a single magazine over and over slows the whole session down. A stack of factory units means more shooting and far less thumb fatigue between strings.

Key Features of the Ruger Magazine 22/45 MKIV

Every Ruger Magazine 22/45 MKIV is held to the same standard as the pistol it feeds, so each detail supports smooth, repeatable performance.

• Genuine Ruger factory magazine, not an aftermarket copy
• Durable blued steel body that resists wear and holds its shape
• Full 10-round .22 LR capacity for extended range sessions
• Direct fit for the Mark IV, 22/45, and Mark IV 22/45 Lite
• Proven follower and spring geometry for consistent feeding
• Button-style follower assist that makes loading easier on the thumbs

Specifications and Build

The Ruger Magazine 22/45 MKIV holds ten rounds of .22 Long Rifle and is constructed from steel for a long service life. The blued finish adds a layer of corrosion resistance while keeping the body slim enough to seat flush in the grip. Because it is built around the .22 LR cartridge and the Mark IV lockup, tolerances stay tight and rounds stack cleanly. Steel construction also means the feed lips keep their dimensions far longer than softer materials would.

Practical Use, Care, and Compatibility

Keeping a Ruger Magazine 22/45 MKIV in top shape is simple. The .22 LR round is a dirty cartridge, so wipe the body down and brush the feed lips every few hundred rounds to clear wax and carbon. A quick takedown of the follower and spring lets you clear any grit that rimfire ammunition leaves behind. Avoid over oiling, since excess lubricant attracts the grime that .22 already produces in abundance. Confirm your pistol is a Mark IV, 22/45, or Mark IV 22/45 Lite before ordering, as earlier Mark series pistols use a different magazine. Store it loaded or empty as you prefer, because a quality steel spring handles either without taking a set. Rotate your magazines during long sessions so each one gets even use.

Why Factory Rimfire Magazines Matter

Rimfire pistols are famously particular about their magazines, and a worn or poorly made unit is the fastest way to turn a fun range day into a string of failures to feed. Sticking with genuine Ruger units removes that variable, since the feed lips, spring rate, and follower are exactly what the Mark IV was tuned around. That consistency is why serious rimfire competitors carry a deep bench of factory magazines rather than gambling on bargain copies.

The .22 LR cartridge is also the most affordable way to build fundamentals, so the more magazines you keep loaded, the more repetitions you bank per trip. Trigger control, sight tracking, and reload drills all improve with volume, and volume is exactly what a stack of reliable ten round magazines gives you. Buy a few, keep them loaded, and spend your range time shooting instead of fumbling.

Whether you are teaching a new shooter, running a rimfire steel match, or just enjoying cheap trigger time, extra factory magazines make the day better. Browse the rest of our parts and upgrades selection to round out your Ruger build. Backed by the reputation of Ruger, this magazine is a low cost addition that pays off every time you hit the range. Ships direct to your door, no FFL required.