KRISS MagEx2 Kit for Glock 21 – 17-Round Capacity Extension 3-Pack

The KRISS MagEx2 Kit extends factory Glock 21 magazines from their standard 13-round capacity to 17 rounds without changing the magazine's overall profile or reliability. This kit converts your G21 magazines into higher-capacity options for competition, duty, or extended range sessions where capacity matters. Each kit includes three complete MagEx2 assemblies, allowing you to upgrade multiple magazines at once.

Constructed from durable polymer materials that match OEM quality standards, the MagEx2 uses a drop-in baseplate and follower system that replaces the factory components. Installation requires no gunsmithing—simply disassemble the magazine per Glock's standard procedure, swap the baseplate and follower, and reassemble. The extension maintains the magazine's feed geometry and spring tension for consistent feeding with factory and defensive ammunition.

• Part Type: Magazine Capacity Extension Kit
• Compatible Firearms: Glock 21 (.45 ACP)
• Capacity: Extends to 17 rounds
• Material: Polymer construction
• Installation: Drop-In (no gunsmithing required)
• Includes: 3 MagEx2 baseplate and follower assemblies