Had the KPOS out the other day, and shot it side by side @ 25 yds on some steel, against a red dot equipped Beretta Storm. The KPOS had AR 15 clamp on BUIS iron sights, which proved to SUCK BIG TIME in the dim/rainy weather we shot in. We had trouble picking up the front sight post, and the large rear aperature was way too big.
The consensus was that the Red Dot sighted Storm was faster shooting than the iron sighted KPOS, but that the mag changes with the KPOS were faster.
I put a cheap red Dot on the KPOS for the next try ... 50 yds for accuracy, and maybe a few more 25 yd fast passes.