[Asgardnz]

I know the man that made the harmonica rifles used in the movie. As I recall some were fully functional, some blank firing and some non firing. There may have been a breachloading one. I will ask him. He used to manufacture and export black powder firearms from New Zealand years ago. He is an amazing engineer. I also know the armourer who worked on the film and he may remember why there are continuity problems between shots. I remember playing with one of the rifles and this weekend just bidded on a blank firing one at an auction(Militaria.co.nz).
Just spoke to a friend who said some of the rifles where chambered for .38 cartridges. He said the director kept telling the actor to turn the cocking handle the wrong way and the rifle maker was on set but the director refused to listen to him.