Kriss MagEx2 Magazine Extension Kit for Glock 21 +17 Round Capacity 3-Pack

The MagEx2 Magazine Extension Kit is designed to increase the capacity of Glock 21 magazines by an additional 17 rounds of .45 ACP ammunition. This three-pack kit replaces the factory magazine base plate and extension components to create an extended-capacity magazine suitable for compatible Glock-pattern firearms and KRISS Vector platforms that utilize Glock 21 magazines. Constructed from durable polymer and finished in black, the kit provides an economical way to expand magazine capacity while maintaining reliable feeding and compatibility with standard-capacity Glock 21 magazine bodies. Each kit includes the components necessary to convert compatible magazines for enhanced capacity and extended shooting sessions. :contentReference[oaicite:0]{index=0}

Product Features

• Adds 17 rounds of additional capacity to compatible Glock 21 magazines
• Designed for .45 ACP caliber magazines
• Compatible with KRISS Vector firearms that accept Glock 21 magazines
• Durable polymer construction
• Black finish
• Replaces the factory magazine base plate
• Includes three extension kits per package
• Provides up to 30-round magazine capacity when installed on a standard Glock 21 magazine