BB firing flintlock mockup
One of my big problems right now is that the gun will be .177, but it's going to mimic the look of an old flint or caplock muzzleloading pistol, which ranged from .36 all the way up to .80 in the largest ones. Obviously the barrel will have to be concealed within a larger, false barrel.
My problem is making the real barrel attach securely without negatively affecting accuracy because it's off center.
fitting the breech of the real barrel with a nut or a thread insert has crossed my mind, but I'm not sure if It will be enough.
pictured are some examples of caplocks so you have an idea of what the finished product is planned to look like