WARNE GLOCK 17/22 MAG EXT +5/+4 FDE

When your Glock magazine feels shallow in the hand, an extension adds both grip real estate and capacity. This Warne +5/+4 extension in FDE works with G17 and G22 platforms, giving shooters in Redwood City and across California a practical accessory for range days and training. Understand California's 10-round magazine limit before modifying your setup.

Extension compatibility and installation

The Warne extension slides onto your existing Glock magazine tube, transforming magazine handling without requiring a complete replacement. Designed for both 9mm and .40 S&W platforms, it adds five rounds to standard 17-round mags or four rounds to 22-round variants—though California law restricts civilian possession to 10-round total capacity. Visit TacticCAL Gun Store in Sunnyvale to inspect fitment on your specific magazine. Find gun store in San Mateo inventory and pricing at TacticCAL.

Frequently asked questions

Does this extension work on factory Glock magazines?

Yes. The Warne +5/+4 extension attaches directly to standard Glock 17 and 22 magazine tubes. Ensure your magazine is clean and the tube isn't damaged before installation for proper seating.

What's the difference between the +5 and +4 capacity increase?

The +5 extension fits Glock 17 magazines (9mm), while the +4 fits Glock 22 magazines (.40 S&W). Capacity increase depends on the original magazine and your firearm's feed lips and frame geometry.

Can I transfer ammo through an FFL in Sunnyvale?

Yes — TacticCAL processes ammunition shipments from online sellers under California's ammunition eligibility check requirements. Browse our full catalog at your Bay Area gun shop.