Actually Bryan I think that is the most common question I am asked when people see me MDing. So its not a stupid question. Unfortunately your Metal Detector will not pick up "Arrow Heads" Unless of course you live in Europe or somewhere the bronze and iron age was the groove, then you are in luck. Or you get really lucky and find some old Spanish Relics from Desoto or Ponce de Leon. If you hunt alot of plowed fields you will most likely find "Paleolithic artifacts" or "arrow heads" while looking down as you sweep your coil to and fro. But then again in my thinking it is groovy to find anything that someone has lost. Be it an arrow head, clad coin, what ever, because it being lost all has a story, when I find it I wonder....what was happening when this was lost or put here. Then again thats just me. Anyway good luck with the new hobby...you'll never be the same again mwaahhahahahaha...oh sorry anyhow Happy Hunting.
Saber