Glock Factory Magazine with Extension - 42 Model, 380 ACP, 6-Round, Polymer Black

The Glock Factory Magazine with Extension for the Glock 42 in 380 ACP gives you reliable, OEM-spec capacity for your subcompact carry gun. This is genuine Glock hardware—not an aftermarket clone—built to the same exacting standards as your pistol. The 6-round magazine ships with a polymer extension that integrates seamlessly with the 42's compact grip, giving your pinky a proper purchase without adding bulk. If you carry a 42 for everyday defense or backup, factory magazines are the only ammunition storage you should trust.

Glock magazines are engineered around a hardened steel feed lips and spring assembly wrapped in proprietary polymer. That combination handles the drop-and-go reality of defensive carry—the polymer jacket absorbs impact and resists the deformation that can turn a magazine into a paperweight. Whether you're running drills at the range or carrying daily, factory Glock magazines hold their geometry and reliability through thousands of cycles.

One note on new magazines: Glock's robust springs ship compressed for safety and reliability. Fresh from the box, the last round can be stubborn to load. The fix is simple—load five rounds, let the magazine sit for a few days to allow the spring to relax, or cycle it repeatedly from full to empty over an afternoon of range time. After break-in, it'll load like it's been in your range bag for years. This isn't a defect; it's the price of a spring that never wears out.

Key Features

• Genuine Glock OEM magazine for the Glock 42
• 6-round capacity in 380 ACP
• Polymer extension baseplate for improved grip purchase
• Hardened steel feed lips and spring assembly
• Drop-tested polymer construction resists deformation
• Drop-free design for reliable seating and removal

Specifications

Frequently Asked Questions

Will this magazine work in my Glock 42?

Yes—this is a factory Glock magazine designed specifically for the Glock 42 in 380 ACP. It will function reliably in any stock Glock 42 frame.

Why is my new magazine hard to load?

Glock magazines ship with a stiff spring to ensure years of reliable feeding and prevent over-compression in storage. Let it sit loaded with five rounds for a few days, or cycle it repeatedly at the range to break in the spring. This is normal and resolves quickly.

Does this magazine come with the extension?

Yes. The polymer extension baseplate is included and installed.

What's the difference between a factory Glock magazine and aftermarket options?

Factory Glock magazines are engineered and tested by Glock to the same tolerances as your pistol. They feature hardened steel internals and proven durability. For carry or duty use, factory magazines eliminate variables and give you the reliability your life may depend on.