first he should have the gun loaded at all time and he could climb a tree or something to shoot them lure them in with meat then shoot them and he needs to turn off the assist thing to see how that works
Because the gunpowder is exposed, it would not be a good idea. The striking powder would just fly everywhere and be lost by movement and I wouldn't put it past these madlad devs to implement a system where the gunpowder gets too humid to properly fire.