On Friday I went to the range and had a chance to try out the FAB Defense KPOS
The KPOS gave my Glock 17 the feel of a submachine gun. It was rock-solid to hold and fun to shoot.
I mounted a FGGS foregrip on the KPOS built in picitinny rails, and a Zahal.org Bungee sling in a single point mount. I was even able to use the original pistol sights.
Here is a short clip of me testing out the KPOS at the range.