The KRISS USA MagEx2 Extension Kit in Flat Dark Earth gives your Glock 21 magazines a serious capacity boost. If you run a KRISS Vector, a Glock 21, or any magazine-compatible pistol caliber carbine in .45 ACP, this kit transforms a factory mag into a 30-round powerhouse—more ammunition between reloads without swapping platforms. The MagEx2 achieves this through a purpose-built extended base plate assembly and matching spring, both engineered from reinforced polymer composites that keep weight down while staying tough.

This is one of those parts that makes sense if you're serious about capacity but don't want to compromise reliability. The kit works with any standard Glock magazine body and follower from Gen 3 forward—so you're not buying whole new magazines, just upgrading what you've got. The Flat Dark Earth finish blends seamlessly with modern tactical setups, and the aesthetic consistency across your mag tubes matters when you're running a precision platform like the Vector.

Installation is straightforward: you're swapping the base plate and spring from your factory magazine with the extended versions from this kit. The result is a magazine that feeds just like your original but holds significantly more ammunition. For .45 ACP shooters, jumping from 13 rounds to 30 is the kind of practical upgrade that changes how you train and compete.

Key Features

• Extended base plate and spring designed for .45 ACP
• Increases Glock 21 magazine capacity to 30 rounds
• Durable reinforced polymer construction
• Works with Gen 3 and later factory Glock magazine bodies
• Flat Dark Earth finish
• Compatible with KRISS Vector and other Glock-compatible platforms

Specifications

Brand	KRISS USA
Model	MagEx2 Extension Kit
Caliber	.45 ACP
Magazine Compatibility	Glock 21 (Gen 3 and later)
Extended Capacity	30 rounds
Material	Reinforced polymer composite
Color	Flat Dark Earth (FDE)
Includes	Extended base plate outer sleeve, extended spring

Frequently Asked Questions

What Glock magazines work with the MagEx2 extension kit?

The MagEx2 kit is designed for standard Glock 21 magazines from Gen 3 and later. You'll need the factory magazine body and follower; the kit supplies the extended base plate and spring.

Can I use this extension kit in my KRISS Vector?

Yes. The MagEx2 kit is purpose-built for KRISS Vector platforms chambered in .45 ACP, as well as other Glock magazine-compatible pistol caliber carbines.

What's included in this kit?

The kit includes the extended base plate outer sleeve and extended spring. You supply your own standard Glock 21 magazine body and follower to complete the assembly.

How much capacity does the extension add?

A Glock 21 magazine with the MagEx2 kit holds 30 rounds of .45 ACP ammunition.