Ok here are the choices.UHC USP GAS Non BlowBack PistolYP MK23 Socom Non BlowbackYP USP Non BlowbackKWC ABS PLASTIC SIG SAUER P226 Gas BLOWBACK
All of them are not the greatest pistols out there. Ideally save the money and get a KSC/KWA/TM GBB. But, to answer your question.... I have the UHC USP and it is a very good pistol with two problems: the mags are terrible (leak constantly) and no adjustable hopup. My friend has a YP M9 (not on the list I know but it is a YP) and it preforms quite well. I have heard pretty good things about the YP in general. The KWC may be a very good GBB but it will not last long. With it being a GBB and having all plastic parts something is going to break/wear down quickly. Thus out of all the guns on the list I would go with the YP's. The only difference between the USP and the MK23 is going to be the size of the gun. If you want a larger gun than go with the MK23.
