The type of firearm used an supported is quite simple:
every gun that uses blackpowder as propellant
This might be any original or replica produced according to an original by any manufacturer, like pistols, revolvers, muskets, shotguns, rifles, carbines
All loading systems are supported as well, muzzle loading an breech loading
Ignition might be given by matchlocks, wheellocks, flintlocks, perkussion, needleguns or breechloaders with metal or paper cartridges.