the mod contains rifle,bullets,gunpowder,casings,leadball and gunbarrel
when animals are hit a little blood flies out. when you shoot it makes a bang sound and drops a casing on the ground by your feet.
link to download mod
http://www.fileden.com/files/2008/7/8/1994463/rifle.zip
video:
http://www.youtube.com/watch?v=nCOFxvjeeUA
now the casings also dissappear after 30 seconds.
I will continue work on it
here are some screenshots