Shield Arms Magazine Extension +5/4 for Glock 17/22 – Gray

The Shield Arms Magazine Extension adds 5 rounds to factory 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. Designed for competitive shooters and duty use, this extension maintains the magazine's feeding geometry while providing a secure grip surface during reloads.

Machined from 6061-T6 aluminum with a Type III hard anodized gray finish for corrosion resistance and durability. Installation is straightforward—simply remove the factory baseplate and replace it with the Shield Arms extension and included spring. No permanent modifications to the magazine or firearm required. The extension's reinforced construction supports the added spring tension and cartridge weight without fatigue.

• 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 Gray
• Installation: Drop-In (requires disassembly of factory magazine baseplate)
• Includes: Magazine Extension, Magazine Spring