KRISS Mag-Ex2 Extension Kit for Glock 17 — 9mm, 40rd

The KRISS Mag-Ex2 Extension Kit is a capacity-extending baseplate assembly designed for factory Glock 17 17-round magazines. The kit includes an extended baseplate, outer sleeve, and an extended spring, manufactured from reinforced polymer for reduced weight and durable service. It is intended for use with compatible Glock 17 Gen3–5 17rd magazines to achieve a total 40-round capacity in 9mm configuration.

Key Specifications

• The caliber is 9mm.
• The overall capacity with a standard Glock 17 magazine is 40 rounds.
• Compatible with Glock 17 Gen3–5 17rd magazines.
• The kit model is Mag-Ex2.
• Construction material is reinforced polymer.
• The finish color is black.
• Kit components include a baseplate, outer sleeve, and extended spring.
• Additional extension provided is +23 rounds when combined with a standard 17rd magazine.
• The package weight is approximately 0.35 lb.
• Units per box: 1.

This extension kit offers a straightforward, lightweight way to increase magazine capacity while retaining the factory magazine body and follower for dependable feeding. Its polymer construction and simple installation make it suitable for range use and magazine-compatible pistol caliber carbines where Glock 17 magazines are used. For users seeking higher capacity without replacing the magazine body, the Mag-Ex2 provides a compact, purpose-built solution.