Cool Prop but No Firing Sound!

Ok so my idea getting this slightly NSFAW (not safe for air wiggles) prop, was that it’d make a cool "Fwa-Twang” sound? Spoiler it makes 0 sound when firing 😢

But! It does make a really cool clicky sound as you cycle through the rubber band ammo. Anyone got any ideas on what else to attach to it? I really wanted it to make a cool twang…