Lemme run this character idea by you: Comes form an order of knights who do in fact use guns. Every member of the order learns to build their own gun, and each family has their own secret techniques and technologies regarding gun creation. Their skill would be the use of their gun. The detriment would be that it would take time to reload after three shots. I guess for RP purposes, the character would have to take a turn and roll to reload. If they fail, they'll have to take another turn and it would keep going until they succeed. Or maybe the roll on the first turn just determines how many turns it takes to reload. You said gunpowder wasn't widespread, so that's why I wanna run this idea past you, to make sure such a character is okay.