As far as i know there are some special weapons with unique sound when you draw or use them:
Super Set (8-bit sounds)
The Dreamer (horse sound while the projectile is in flight)
The Predator (laser sound)
Greatsaw and Chainsword
and i think there are more. Unfortunately you cannot draw or attack with a weapon when you use the preview-function in the wardrobe but i hope these weapons i know may help you.
If you use youtube to search for these weapons you might also get to hear them or ask players ingame who already own them.