everything, from its rate of fire to its light weight ot the easy field stripping. theres nothin wrong with this gun. the stock barrel is alright but i got lapco bigshot for mine. ive recently found a new bolt for it so im getting that too. where i live you need an expansion chamber so get that. besides the barrel this is a good solid gun.
theres not a thing wrong with tis gun.
like that kid said half the people in here talking down on the sheridan dont even have one. but you still need to upgrade this gun just for looks. its worth more than it costs, got mine for 150. it will give any gun in its class a run for its money. id recommend this gun to anyone who wants to kick major portions of ass.