Welcome to the Strelets Forum. Please feel free to discuss any aspect of 1/72 scale plastic figures, not simply Strelets. If you have any questions about our products then we will answer them here.
Dear Strelets, Peter has made some excellent suggestions. I particularly support his idea to cast the guns in hard and the figures in soft plastic.
Several of those guns are preserved in museums and/or have been very common so dimensions should not be too hard to find. Some links below for starters, can someone add to it please?