Are you looking for the fire fx or are you looking to actually fire the weapon (i.e. animate a projectile)?
Typically weapon props might have the firing fx included, or can be create using iClone functions or can be purchased as suggested. If you are looking to actually launch a projectile then you typically have two props...the weapon and the projectile. First you execute the firing fx and then make the projectile prop visible and animate it.
EDIT: In the future, please try to put the theme of your question into the subject line of the post. A generic "help me" is likely to get less responses than something like "help me with weapon projectiles".
"We often compare ourselves to the U.S. and often they come out the best, but they only have the right to bear arms while we have the right to bare breasts"
Bowser and Blue, Busting The Breast
Edited
8 Years Ago by
Lord Ashes