KRISS USA Magazine Extension Kit for Glock 17 – 40-Round 9mm

The KRISS USA Magazine Extension Kit converts your factory Glock 17 magazine into a 40-round high-capacity magazine. Designed for extended-range training sessions and competition use, this extension eliminates frequent reloads while maintaining reliable feeding. Compatible with Glock 17 and other Glock pistols that accept G17 magazines in 9mm.

Constructed from durable polymer with a matte black finish. Installation is straightforward: disassemble your factory magazine, install the extension base and included spring, and reassemble. No permanent modifications to the firearm required. Kit includes extension body, high-capacity spring, and base plate.

• Part Type: Magazine Extension Kit
• Compatible Firearms: Glock 17 and Glock pistols accepting G17 magazines (9mm)
• Capacity: Converts to 40 rounds
• Material: Polymer construction
• Finish: Matte black
• Installation: User-installable, no gunsmithing required
• Includes: Extension body, magazine spring, base plate

Note: Verify local and state laws regarding magazine capacity limits before purchase. High-capacity magazines are restricted or prohibited in some jurisdictions.