I have both. Got another KT. Looking to sell the HP. The Sub is very accurate and takes my Ruger mags. Rarely an occasional stovepipe. The HP has an ATI stock and is a jam-o-matic that can't even go through one of its aftermarket mags without stopping. And I can't get the mags to work no matter what I do. I'll stick with KT (provided any can be found).