Eliminate frequent reloading with the Tyrant CNC Glock Compatible Glock 19 Magazine Extension. This mag extension also works on Glock 23 and Glock 26 models as they share the same bottom half geometry, giving 9mm models a +5 and .40 models a +4 gain in capacity. The best feature, however, is how Tyrant have engineered this magazine extension to be installed AND removed without any tools. Their ‘NoBak’ advanced retention plunger technology ensures a quick and tool-free installation, making this mag extension the easiest on the market.