Sig Sauer Magazine Sig P320, P250 Full Size 40 S&W, 357 Sig Steel Matte

A Sig Sauer magazine for P320 and P250 full-size handguns chambered in .40 S&W and .357 Sig is one of the most reliable ways to keep your pistol running flawlessly. Factory magazines aren't just a convenience—they're engineered to the exact tolerances of your gun, and using original Sig Sauer magazines eliminates a common source of feeding and cycling problems that can plague even well-maintained firearms. Whether you're building a duty loadout, setting up for the range, or keeping a backup mag on hand, this steel magazine delivers the performance and durability Sig's reputation is built on.

The magazine body is constructed from hardened steel with a matte (satin black) finish that resists corrosion and wear. The black polymer follower moves smoothly through the magazine body, and the removable base plate makes cleaning and maintenance straightforward—no special tools needed. This straightforward, proven design has been fielded by shooters and law enforcement for years, and it remains one of the most dependable choices for P320 and P250 owners.

If you're running a P320 or P250 full-size frame, having multiple factory magazines on rotation extends the lifespan of any single mag and gives you flexibility for training, competition, or duty use. Mag springs fatigue over time; rotating through several magazines keeps any one mag fresher longer. Keep one in your range bag, one in your safe, and one in your carry rig—factory Sig magazines are that worth having in multiples.

Key Features

• Factory Sig Sauer magazine for P320 and P250 full-size frames
• Hardened steel body with matte black finish for corrosion resistance
• Black polymer follower for reliable, smooth operation
• Removable base plate for easy cleaning and maintenance
• Chambered for .40 S&W and .357 Sig

Specifications

Frequently Asked Questions

Will this magazine work in both my P320 and P250?

Yes, this factory Sig Sauer magazine is designed for both the P320 and P250 full-size frames, and it's compatible with both .40 S&W and .357 Sig chamberings.

What's the difference between a factory mag and a third-party mag?

Factory Sig magazines are built to the exact specs of your pistol and have been proven in the field. They eliminate guesswork around feed angles, spring tension, and follower geometry—all critical factors in reliable cycling. If you're experiencing feeding issues, switching to factory mags is often the fastest solution.

Can I take the base plate off to clean it?

Yes. The base plate is removable, which makes it easy to disassemble the magazine for thorough cleaning and inspection without any special tools.

Is this a full-capacity or extended magazine?

This is a full-size magazine for the P320 and P250 full-size frames. Extended-capacity versions have a longer base pad that extends below the grip; this standard magazine does not.