I have an excellent DrozdMax Blackbird full auto machine BB gun. It slings bbs at about 1000fps and can be varied with air pressure applied. 400+ rounds per minute. Capable.to run off of CO2 or HPA. This one is upgraded with a longer barrel and full auto chip. It also has single shot and 3 shot burst with the full auto. It is alot of fun and the most powerf bb gun i habe ever seen. Makes short work of coconuts at 25 yds and penetrates much more than most anticipate. This is for sale or trade at $800 shipped, cash is king. I would love to keep it, but i do not own a compressor and hand pumping this thing is a chore, doable but not fun.