I've always been intrigued by the Ferguson rifle. The helical breech and breech loading of a flintlock is just ingenious. However, there are no commercial repops out there, originals (the few surviving) are behind glass in a museums and those that are out there have to be made from parts and I'm not talking Kibler level of sticking parts together. So today, a friend of mine showed up at the range with a Ferguson he just finished and he's no slouch at gunsmithing and yup, we sent more than a couple round balls down range. Pix to follow later, I was too busy twisting the trigger guard and pulling the trigger.
https://en.wikipedia.org/wiki/Ferguson_rifle
https://en.wikipedia.org/wiki/Ferguson_rifle