I've had a TC Renagade for quite some time. Initially it was percussion, but then I bought the extra lock and breech plug so I could use it as a rock lock. At the time there was a guy who built custom flintlocks in the area and I got a bunch of tips from him. Buy the BEST flints you can find. I think mine were synthetic but threw a huge spark. What ever gun you choose, take a small drill bit and make a dimple in the touch hole. This makes sort of a forcing cone effect and really helps ignition. Hope this helps.