I have for sale an Umarex Steel Storm BB Machine gun. It shoots .177cal BBs at a veloccity of 430 FPS using two CO2 cartridges. It can be fired single shot or full auto in a 6 shot burst. Magazine holds 30 BBs. Gun is in new condition in original box. I will also include a container of BBs and a box of CO2 carts. ... 6/23/2016 ~ Wausau, Wisconsin ~ 1.5 mi.