Shield Arms Magazine Extension +5/4 for Glock 17/22 – Red Anodized Aluminum

The Shield Arms Magazine Extension adds 5 rounds to Glock 17 magazines or 4 rounds to Glock 22 magazines, increasing capacity to 22 rounds (9mm) or 19 rounds (.40 S&W) without sacrificing reliability. This extension replaces the factory magazine baseplate and extends the magazine body to accommodate additional cartridges. Ideal for competitive shooters, range training, or anyone wanting maximum capacity from their full-size Glock.

Machined from 6061-T6 aluminum with a Type III hard anodized red finish, this extension is lightweight yet durable. Installation is straightforward—remove the factory baseplate, swap on the Shield Arms extension, and install the included spring and follower. No permanent modifications to the firearm required. The extended baseplate provides a secure grip surface and maintains mag drop reliability.

• Part Type: Magazine Extension
• Compatible Firearms: Glock 17 (9mm), Glock 22 (.40 S&W)
• Capacity Increase: +5 rounds (G17), +4 rounds (G22)
• Material: 6061-T6 Aluminum
• Finish: Type III Hard Anodized Red
• Installation: Drop-In (baseplate replacement)
• Includes: Magazine extension, spring, follower, installation hardware