I've tried almost all the Glock 43 magazine extensions and will be happy to share the results when I test just a couple more. I'd love to hear your experiences too... which are best & worst? Maybe the most important question is 'Will we ever see an aftermarket magazine greater than 6 rounds?' Does anyone know of a company that makes extended mags for other models of Glocks or other manufacturers? I've got to believe there's a HUGE demand based on the number of extensions.