The Evil Smokestack is a universal accessory to improve the feeding of all vertical feed guns. Basically it increases the number of balls over the breech which will increases feed rate. It also will allow your gun to accept any hopper as well as adjusting to fit in any feed neck. Through a unique system of 3 tapered o-ring grooves you can create any combination to fit any gun and any hopper. The inside of the smokestack is also greatly chamfered to further reduce any kinks in feeding.