First thing to learn in airsoft; this isn't Call Of Duty. Weapons are not as precise, won't upgrade your Prestige level and doesn't reload just by pressing the R key.
A revolver is for cowboy roleplay IMO and is pretty useless in a game where most people tend to use modern pistols.
Any pistols works out indoors; just choose what fits you best and the upgrade availability and quality in the end.
West Coast EOD Supporter.
// Bang One, Bang Em All !
// In war, it's not who's right, but who's left.