This is not my first AA gun, but it is the first time that I did my research before building. I left the armour off because I like the look of it without it.
About this creation
The "feet" can move up and down for ruff terrain.
Research is GOOD!
If you ever build an recreation of a real vehicle/gun/building/etc. Do some research on it before building. Not necessarily learning everything about it, but find a bunch of good pictures of what your building and think about what lego pieces will work best to bring out the realism in your MOC, instead of building from only one picture or no picture at all.