Give yourself an advantage over the competition with the Tyrant Designs® 9mm/.40S&W +4/5 Magazine Extension for Glock® 17, 22, 34, 35, 19X, 45 pistols. This drop-in magazine extension features a proprietary, CNC-machined aluminum body, designed for simple, tool-free installation. Chamfered edges offer smooth, snag-free carry, while an integrated knurl delivers a positive grip for faster reloads in any environment or weather condition. What’s more, this Glock-compatible pistol magazine extension is designed to work with the factory spring for fast installation, without inhibiting performance! NOT compatible with Magpul® Pmag® magazines or Glock 10-round magazines. Made in USA.