Kriss Mag-Ex2 Extension Kit 9mm 40rd Glock 17 Gen3-5 Black

The Kriss USA Mag-Ex2 Extension Kit transforms standard Glock 17 magazines into high-capacity powerhouses, extending 17-round magazines to 40 rounds for extended shooting sessions. This black polymer extension maintains reliable feeding while dramatically increasing ammunition capacity for competitive shooting and training applications.

What Makes This Different

Unlike basic magazine extensions that simply add length, the Mag-Ex2 system incorporates Kriss's proven feeding geometry to ensure consistent cartridge presentation. The extension maintains the original magazine's spring tension characteristics while accommodating 23 additional rounds. Factory testing demonstrates reliable cycling through thousands of rounds without feed interruptions or jamming issues common in aftermarket extensions.

Key Features

• Extends Glock 17 Gen3-5 magazines from 17 to 40 rounds capacity
• Black polymer construction matches factory Glock magazine aesthetics
• Maintains original magazine spring and follower for proven reliability
• Tool-free installation requires no permanent modifications
• Compatible with factory Glock 17 magazines in 9mm Luger
• Reinforced polymer body resists impact and environmental stress
• Retains drop-free functionality for tactical reloads

Range testing confirms the Mag-Ex2 maintains feeding reliability across various 9mm loads, from 115-grain ball ammunition to 147-grain hollow points. The extended magazine fits standard magazine pouches and tactical gear designed for high-capacity magazines. Competitive shooters report consistent performance through USPSA and 3-Gun matches without feeding malfunctions.

Technical Specs

• Caliber: 9mm Luger
• Capacity: 40 rounds (extends 17rd magazines)
• Compatibility: Glock 17 Gen3, Gen4, Gen5 magazines
• Material: Black polymer construction
• Installation: Tool-free attachment system
• Weight: Approximately 2.1 oz (empty extension)
• Country of Origin: USA
• SKU: KVAMX2K90BL00

The Mag-Ex2 represents a practical solution for shooters requiring extended capacity without compromising reliability. Professional training facilities and competitive shooters choose this extension for its proven track record and consistent performance across diverse shooting conditions.