Cooked shot can do that and it's another reason why it's a great addition !
But i totally agree that in such an "ambush-focused" game, you don't have more luring possibility.
firing a gun in the air is cool, what about a device, like tnt charge, you plant it and it only a loud noise at the end of the timer (we can use regular tnt charge for that but then, price, weigth and availability needs tweaking)
Another variation of this idea would be to add an optional slot on the tnt charge blueprint, making it do a loud noise 5 sec before exploding, attracting enemy and then exploding in their faces.