Wherever he is, John Galt probably prefers a weapon with more range. The Uzi, especially with the solid wooden stock, does work all right to about 100 meters.
A little more forward lean would have been nice, but it worked out well enough.
Being able to correct aim by observation of tracers really helps. SBR tracers used here are still available. I think they are an excellent investment for training. Standard range tracers work to 75-100m, extended range to about 200.