Trumpet

Trumpet (トランペット) is one of Xigbar's weapons in Kingdom Hearts 358/2 Days. As the name suggests, it is a pair of trumpets. They shoot projectile sound waves from the trumpets' bells, and make the sound of a trumpet as Xigbar shoots and reloads.

It is also notable that since the description for "Mystery Gear" states that it brings out the user's personality, this may be a reference to the fact Xigbar likes to "blow his own horn".