...Firing isn't solved yet but it looks like it could do that as well! - Musket 'model' made of wood: the whole thing costs about 2 euros (1 for the wood and 1 for the paint if you count the amount used and not the whole container you bought).
Firing mechanism made of cardboard, a thing you can always trust. I'm left-handed so not sure if it's on the correct side but whatever. The lock and the barrel is metallic, the 'wooden' parts of the musket are light brown.
A quick 'blueprint' of the thing. All you need is a rasp and a saw, plus an approx. 2 metres long pine slat. The thing is cut up in two parts first in an acute angle, then the shorter part is cut in two again and then the necessary angles are shaped at the ends; the rasp is used to make the barrel part and the lower parts curvy.
Marks: red - parts cut/rinsed off; yellow - nails/staplers to fix the parts together. I also put some tape where the two bigger parts are joined together and used sandpaper to remove the uneven parts.