KRISS MagEx2 Kit for G21 — +17rd, FDE, .45 ACP

The KRISS MagEx2 Kit is a capacity-extending baseplate assembly designed for factory standard Glock magazines used with G21 magazines and compatible platforms. The kit is constructed from reinforced polymer and includes an extended outer sleeve and an extended spring to work with the factory magazine body and follower. It is caliber-specific for .45 ACP and intended for use with Gen 3 and later Glock magazines to increase magazine capacity for KRISS Vector and Glock-compatible pistol-caliber carbines.

Key Specifications

• Provides an extension of +17 rounds to standard G21 magazines.
• Yields a 30 round total capacity when paired with a standard G21 magazine.
• Caliber is .45 ACP.
• Color/finish is Flat Dark Earth.
• Constructed from reinforced polymer components.
• Includes an extended baseplate outer sleeve and an extended spring.
• Designed to fit G21 magazines (factory standard bodies and followers).
• Compatible with Gen 3 and later Glock magazines and Glock magazine-compatible pistol-caliber carbines.

Engineered to add practical capacity without altering the factory magazine body, the MagEx2 Kit offers a straightforward upgrade path for owners who require additional rounds in a compact, durable package. Its polymer construction and simple installation preserve reliable feeding and handling characteristics while providing a purposeful increase in capacity for range use and compatible platforms.