It's loud, but not as loud as I expected or hoped. I didn't get to actually use it as the flimsy plastic trigger hinge was factory-broken, right out of the box.A replacement is on the way, but I don't really expect this item to hold up in use. Its all-plastic construction is just too fragile and poorly engineered at stress points. The mounting system is also inadequate. It's very toylike, but toys are usually more rugged than this.In view of what this thing really is, the MSRP is at least four times too high. Great idea, very poor execution.