This is the Tyrant CNC +4 magazine extension for Glock 21 pistol magazines. 

You can never have enough rounds of .45 ACP, so why not add four more to your factory Glock 21 magazine?

CNC machined out of aerospace-grade aluminum and featuring an anodized finish, you’ll be hard-pressed to find another magazine extension as durable as this one! The precision machining results in a flawless finish, which also adds to the aesthetics of your pistol. 

Thanks to Tyrant’s retention plunger technology, you’ll be able to install these in under 10 seconds, with no required tools! As if all that wasn’t enticing enough, each mag extension is made right here in the USA. 

Don’t forget to add a couple to your cart prior to checking out! You can thank us later. 

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.