You have Osttruppen that have a 6 man squad but I know I know, it's a DLC commander...
but another great way to capture equipment is to simply have an half-track and not only reinforce the "new" squad with the captured weapon but also reinforce the squad with only 1 man left and keep both of these squads in the battle. It's a great advantage vs. what the soviet have at the point in the game and believe you are not wasting any manpower or fuel by getting an half-track, it's an awesome unit no matter what your strategy is.
I honestly think there are bigger issues to resolve but I wouldn't even consider this to be a real problem at the moment.
And if you have a Half-Track and Osttruppen then it's even better 'cause Osttruppen reinforce like the flash and so do weapons crewed by them.