I'm not sure if that model was worth the money. I'm no modeller but that first screenshot looks weird. Where are the guy's shoulders? Why are arms so weirdly bent?
And on the second one you see that sharp edge at the "shoulder" and also the elbows look like the model was not modelled to be animate.

Sorry for ranting on that model which you bought.
Another thought: I hope that soldier is not firing the SAW in that pose