usopp shoud really use a gun now..

ehh nah i dont think he needs a gun just yet

i am so looking forward to this epic showdown between father and son, if there even is gonna be one. that and van auger

His sling shot is better IMO. He wouldnt have been able to snipe the marines during the Enies Lobby with a handgun. Besides, with all the shell attachments he made, his sling shot is way over any what any modified gun could be. His sling shot also allows for "hot swapping" bullets.