I use a cutoff carbon arrow and airsoft pellets to whack stinkbugs on my front porch. A solid hit makes them disappear.
Just don't inhale!
Thanks for the idea. I've played with blowguns since my childhood, and several years ago also bought a .625 caliber Cold Steel Big Bore.............VERY impressive.
My smallest pea-shooter was made from a brass ink pen cartridge, and shot #9 shot (great on the school bus), but I hadn't considered making one to shoot cheap airsoft ammo. My son and I will have fun with this.