where can i get 300 fireball ano on the net. and are ther eany 20" 300 fireball barrels??

Corbon.com sells the loaded ammo for the 300 wisper, go to the website and then, store, then self defense ammo , then 300 wisper. I can get you a complete upper with the bolt and bolt carrier. I have on and it is a very accurate weapon and depending on the load it can be very easy to reload your own ammo, please do not throw your brass away since it is a custom chamber brass and I will buy all you have if you do not want the brass.