Most military guns didn't have rifling until the mid-NINETEENTH century. For RevWar, really, you just need to start socking some $$ away and look. If you're in a unit, most have sources for them. For that matter, you could prob find a used one cheaply (I did-$200.). Reenacting AIN'T cheap! Take your time, do it right, don't get in a rush. JOIN a unit first -- most have loaner gear.