Hiya and thx for the thread. I'm surprised that a simple vertical grip is rarely a choice, considering we've seen how an extra mag on a fully auto cz pistol can be used as one, I've seen operators use the hanging mag as one,not suggested. Not to mention a vertical grip doubling as a gun retention device, as well as a weapon when you have two arms wielding it. Even if some platforms require the tax stamp, its form and function is ,I think, under represented. Cheers.