A reliable aftermarket magazine for your Glock .40 S&W platform, the KCI USA 10-round magazine is built tough for shooters who need dependable capacity and durability without breaking the bank. Whether you're stocking spares for the range, competition, or duty carry, this magazine combines a hardened steel feed system with a protective polymer body—a combination that's stood the test of time in the aftermarket magazine world.

KCI USA magazines are engineered with a hardened steel insert that handles the real-world abuse magazines take: the dings, drops, and wear from loading and unloading. The polymer exterior protects that steel core from deformation and corrosion, keeping your magazine reliable through seasons of use. The stainless steel spring resists fatigue, so you're not constantly replacing magazines just to maintain function.

If you run a Glock 23 or 27 in .40 S&W, this 10-round magazine is a straightforward upgrade or backup option. It feeds and functions like you'd expect—no frills, no surprises. Pair it with your carry gun, range kit, or duty rig as a spare. At this price point, there's no reason not to have extra magazines on hand.

Key Features

• Hardened steel insert for reliable feeding and durability
• Polymer body protects against impact, deformation, and corrosion
• Stainless steel spring resists fatigue and extends service life
• 10-round capacity—ideal for range, carry, and backup use
• Glock 23 and 27 compatible

Specifications

Brand	KCI USA
Caliber	.40 S&W
Capacity	10 Rounds
Body Material	Hardened Steel / Polymer
Spring Material	Stainless Steel
Fits	Glock 23, Glock 27

Frequently Asked Questions

What Glock models does this magazine fit?

This magazine is designed for Glock 23 and Glock 27 in .40 S&W. Both models use the same magazine platform, so this 10-round mag works with either gun.

Is this magazine reliable for carry and defensive use?

Yes. The hardened steel insert and stainless steel spring provide the dependability required for duty and carry applications. The polymer body is designed to withstand regular use without failing.

What's included with this magazine?

You're receiving one KCI USA 10-round magazine. The magazine arrives ready to load and use—no assembly required.

Why choose KCI USA magazines over factory Glock mags?

KCI USA offers solid performance at a lower cost, making them an excellent choice for backup mags, range spares, or building out your mag supply. The hardened steel and polymer construction provides reliable service for shooters who want quality without the premium price tag.