Guild Wars 2

Does the Crimson Rifle have a unique sound or does it sound like a normal Rifle?

It’s a skin I can’t think of reason it would change the sound of a Rifle?

Roundabout.1752:

It’s a skin I can’t think of reason it would change the sound of a Rifle?

The warhorn has a different sound than a regular warhorn. It sounds like a lion’s roar.
http://wiki.guildwars2.com/wiki/Crimson_Lion_Warhorn_Skin
“Sound effects are replaced by lion roars when blown.”

As to the rifle, wiki and dulfy makes no mention of a different sound so the answer seems to be no.

I went ahead and got the rifle. There is no change in the sound unfortunately.

My Layline Rifle skin certainly changes the sound when fired AND when equipped (or swapped).