Assault rifles.
But if I had to pick which handgun design is more inferior, I would say revolvers are. Antiquated design, lacking magazine capacity compared to pistols, poor gas seal compared to chambered pistols.
That said I consider handguns in general mostly useless (though sadly not mostly harmless).
doesn't pistol basically mean a single handed hand gun? isn't a revolver a type of pistol?
No. Pistols are fired with both hands just as revolvers are. In pistols, the barrel and chamber are parts of same piece of metal, while on a revolver, the rounds are chambered on the revolving cylinder which contains multiple chambers that line up with the barrel when the weapon is loaded.
Pistols typically today mean semi-automatic pistols; the word has other meanings too, such as dueling pistols of the olden day (which were typically used with one hand for protocol reasons and to present as small a target as possible, since hitting was more of a statistical issue than anything based on aiming accuracy, so using two hands for added stability would have been less beneficial than reducing target profile).