KRISS EX2 Kit for Glock 21 – 17-Round .45 ACP Magazine Extension, Black

The KRISS EX2 Kit extends Glock 21 magazine capacity from the factory 13 rounds to 17 rounds of .45 ACP, adding four rounds without sacrificing reliability. This kit is designed for shooters who need more rounds on tap for competition, range training, or defensive applications where capacity matters. The extended baseplate maintains a positive grip surface and integrates cleanly with the magazine body.

Constructed from durable polymer with a black finish that matches factory Glock aesthetics, the EX2 Kit installs without permanent modification to the magazine. Installation requires disassembly of the factory magazine baseplate and spring, then reassembly with the included KRISS spring and extension baseplate. Basic familiarity with magazine disassembly is recommended. The kit includes all necessary components for one magazine conversion.

• Part Type: Magazine Extension Kit
• Compatible Firearms: Glock 21 (.45 ACP)
• Capacity: Extends to 17 rounds total
• Material: Polymer baseplate
• Finish: Black
• Installation: User-installable with basic tools and magazine disassembly knowledge
• Includes: Extension baseplate, extended spring, and installation components for one magazine