This is a Tyrant Designs® +1 extension for Glock® 43 factory magazines.
The fastest installing magazine extension on the market, this baseplate from Tyrant Designs is the best way to add capacity to your Glock 43. Equipped with Tyrant Designs toolless installation technology (made possible by their signature retention plunger attachment system) these extensions can be added to your stock Glock magazines in just 10 seconds. Never satisfied with a generic approach, Tyrant Designs engineered these from the ground up to match perfectly with the style and ergonomics of the Glock 43. Precisely crafted from aerospace aluminum and refined with carefully chamfered edges, these extensions may just be the best looking on the market. The extra mass also helps keep your magazines dropping free reload after reload. These extensions are designed to work with the stock magazine spring. Compatible with Glock 43 factory magazines.