Upgrade your Glock magazines with the Shield Arms Magazine Extension - a simple, reliable way to add capacity while keeping maintenance fast and easy. Constructed from lightweight aluminum, this extension increases capacity by +5 rounds on Glock 17, 19X, 34, and 45 magazines, and +4 rounds on Glock 22 and 35 magazines. Shield Arms' clever easyaccess floorplate design lets you inspect or remove the spring and follower without having to separate the extension from the magazine body, saving time during cleaning or troubleshooting.Precision machined for consistent fit and durable performance, the extension preserves reliable feeding geometry and provides a positive hand purchase for faster reloads. Before purchasing, please verify local laws and restrictions regarding magazine capacity and aftermarket extensions. Buy the Shield Arms Magazine Extension at AR15 Discounts.Specifications Material: Aluminum Fits: Glock 17, 19X, 22, 34, 35, 45 (verify mag generation/fitment) Added Capacity: +5 (G17/19X/34/45), +4 (G22/35) Design Feature: Easyaccess floorplate for spring & follower maintenance