If you carry the Glock 42, you already know it’s one of the best .380 ACP subcompact pistols on the market — lightweight, slim, and incredibly reliable. But one area where it can benefit from an upgrade? Magazine capacity.

That’s where the ProMag 10-round extended magazine shines. It’s the perfect balance between added firepower and carry-friendly design. At Pro Armory, we proudly offer this upgrade for Glock 42 owners looking to train longer, shoot more comfortably, or carry with a little extra confidence.

Why the ProMag 10-Round Extended Mag Stands Out

The Glock 42 ships with a 6-round factory mag — fine for deep concealment, but a bit limiting on the range or for those with larger hands. The ProMag extended mag nearly doubles your capacity while improving control and ergonomics.

Key Benefits:

• Increased Capacity: 10 rounds of .380 ACP on tap — no need to reload as frequently during drills or defensive training.
• Improved Grip Profile: The extended design offers more surface area, especially helpful for shooters with larger hands or those seeking more recoil control.
• Durable Construction: Built with ProMag’s high-strength black polymer and a chrome-silicon spring for long-term reliability.
• Anti-Fatigue Design: Made for extended use, with a follower that cycles smoothly and consistently.

This is a functional upgrade — not just about looks or novelty. Whether you're at the range or relying on your Glock 42 for EDC (everyday carry), this extended mag gives you more versatility without making the firearm bulky or hard to conceal.

Built for Real-World Use

The ProMag 10-round magazine was designed with compact utility in mind. Unlike oversized or unbalanced magazine extensions, this model maintains a practical profile that still conceals well inside a holster or purse.

It’s also drop-resistant, reload-friendly, and easy to manage during training sessions. The reinforced feed lips and molded baseplate ensure you won’t be replacing this mag anytime soon — even after dozens of reloads and dry-fire drills.

ProMag stands behind their products with a lifetime warranty, which makes this upgrade an even smarter investment for budget-conscious shooters.

Who This Magazine Is Perfect For?

• Everyday Carriers: Need more rounds without switching platforms or buying a new pistol? This extended mag gives you a better margin of readiness.
• Range Enthusiasts: Spend less time reloading and more time practicing.
  New Shooters: Easier grip control means a more stable shooting experience for recoil-sensitive users.
• Backup Gun Users: Make your secondary firearm even more capable in a defensive scenario.

If you’re training with FMJ, we recommend using 95gr rounds — the same grain weight as most premium hollow point loads — to mimic your real carry experience with the extended magazine.

Pro Armory’s Customer Commitment

We’re not just here to sell you gear — we’re here to equip you with confidence. Thousands of customers trust Pro Armory for reliable products, fair prices, and veteran-backed service that puts real-world knowledge first.

Get More from Your Glock 42

The ProMag 10-round magazine is a practical, affordable way to get more performance out of your Glock 42 without compromising its biggest advantages: size and simplicity.

If you're ready to extend your training time, carry with confidence, and make your subcompact even more effective, this mag is a must-have.

Check it out now at Pro Armory and give your Glock 42 the upgrade it deserves.

Shop >Magtech.380 ACP 95gr FMJ Ammo At Pro Armory!

Magtech 380 ACP 95gr FMJ 50 round

$16.34
at Pro Armory

view product

Prices accurate at time of writing

Frequently Asked Questions

Is the ProMag 10-round magazine reliable for carry?

While every firearm and mag combo should be tested before carry, many users report excellent reliability with this magazine. It's designed for consistent feeding and durability.

Will it make my Glock 42 harder to conceal?

Slightly — the extended mag adds grip length. However, most users find the added control and capacity worth the trade-off, especially when using a good holster.

Can I use FMJ ammo in the extended mag for training?

Absolutely — just match the bullet weight (typically 95gr) to your self-defense hollow point loads for consistent recoil and accuracy during training.

Is this mag compatible with the Glock 43?

No. The Glock 42 uses .380 ACP, while the Glock 43 uses 9mm. Their magazines are not interchangeable.