ETS Group GLK4212 Extended 12-Round 380 ACP Magazine for Glock 42 - Clear Polymer

The ETS Group GLK4212 is a 12-round extended magazine for the Glock 42 in 380 ACP, built from durable translucent polymer that lets you see your ammunition status at a glance. If you carry a 42 for everyday defense, shoot it at the range, or compete with it, this extended-capacity reload fills the gap between the factory standard and maximum firepower without adding bulk to your EDC or match setup. The clear polymer construction means no guesswork—loaded or empty is immediately obvious, a practical detail that matters when you're managing multiple magazines through a training session or a competition string.

ETS has engineered these magazines for the long haul. The feed lips and body are creep-resistant, so they won't spread or degrade even after months of storage fully loaded. Disassembly is straightforward thanks to a purposefully designed base plate, and the magazine works with both Glock OEM and popular aftermarket floorplates, giving you flexibility in how you configure your setup. Whether you're building a reliable carry gun, stocking spares for range days, or adding depth to a match rotation, this 12-rounder combines practical capacity with the lightweight, no-rust advantages of polymer construction.

Glock 42 shooters often hunt for higher-capacity options that don't compromise reliability or durability. This ETS magazine delivers on both fronts—it's engineered to feed the 380 ACP round dependably and is purpose-built for the 42's platform, so you can trust it the way you trust your gun.

Key Features

• 12-round capacity for extended firepower and training flexibility
• Translucent polymer body for instant visual ammo status
• Creep-resistant design—feed lips and body maintain integrity under long-term loaded storage
• Easy disassembly with specially engineered base plate
• Compatible with Glock factory and aftermarket floor plates
• Lightweight polymer construction—no corrosion, minimal weight penalty

Specifications

Frequently Asked Questions

Will this 12-round magazine work with my Glock 42?

Yes. The GLK4212 is designed specifically for the Glock 42 in 380 ACP. It's also compatible with both OEM Glock and aftermarket floor plates, so you can tailor fit and function to your preference.

Can I use this magazine for carry or is it match-only?

This extended magazine works for either role. The added capacity is useful for EDC if you want more rounds on board, and it's equally at home on the range or in competition. The lightweight polymer keeps the weight penalty minimal, and the translucent design is practical for any shooting discipline.

How durable is the polymer, and will it wear out if I keep it loaded?

ETS translucent polymer magazines are engineered to resist creep—the feed lips and body won't spread or degrade even when stored loaded long-term. This design philosophy means your magazine will maintain reliable feeding and structural integrity through years of use.

What comes in the box?

You receive the ETS Group GLK4212 magazine. The translucent polymer body makes it easy to monitor ammunition levels, and disassembly for cleaning is straightforward thanks to the purpose-designed base plate.