I never liked shooting full-auto. I just liked double-tapping the target.I had a Russian IZH Drozd "Bumble Bee" but the problem with it and all Co2 full-autos is you only get about half-way through a Co2 cylinder before they freeze-up. Tons of fun before then though.
The IZH's barrel was rifled for use will lead BBs though it would take the steel ones too. Mine had a detachable stock and a single shot, three round burst, or full-auto selector switch.
If you used lead BBs (they engaged the rifling) it was very accurate too.
I believe that they make/made a compressed air conversion for them that eliminates the freezing issue.
I also love sniper operations and blowing shit up.
I love explosives. Det-cord and C4.