I have been looking for any company that offers suppressor height sights to co-witness with a Vortec Viper/Trijicon RMR etc. Can't find anyone who offers them for the PPQ. Same goes for a sight mount or machine services to make these sights mount on the PPQ. There are all kinds of options for the H&K VP9 which is little more than a clone of the PPQ. Yes, I know that I can buy the Q5 to solve the sight base problem ( not the co-witness suppressor height problem ). So why is there so little third party support for the PPQ? I have both the PPQ and the VP9 amd I lke the PPQ better.