I like the non-fussy nature of all the flat surfaces and I also like it's small size. The only thing I would change is the gun barrel, and this is just my opinion, but for guns longer than 1" stacking cylinder pieces and nothing else doesn't do a build (especially one as neat as this) justice, and instead I would normally go for giving is some kind of little detail. Having said that, this is a very "clean" thing, so perhaps a simpler gun is fine. Still a pretty build.
ALSO: While you based it on a T-34, it reminds me of a French armoured car; http://www.army-technology.com/projects ... -vehicles/