Bolts

These are the standard bolts that are sold by every bowyer. They are not special in any way and don't deal any extra damage, but will work with any normal crossbow. Thankfully, any adventurer with some skill in magic can upgrade these to superior magic bolts with the spell Enchant. They are available in  Ultima V,  Ultima VI,  Ultima VII and  Ultima VII Part Two.

Trivia

 * Buyable bolts -- as well as the need for ammunition -- first appeared in  Ultima V.