[MTG Guru]

Depending on what bits you have, you can actually get more heavy's from you pack.

If you only use the crouching legs for the trooper with the actual heavy weapon, you still have one set of crouching legs spare.
If you have ever bought a tank, there's firing arms on the accessory sprue, just with a slightly different handle shape and no shoulder pads.
Then basically, with a spare torso/head, you have another crouching gunner body ready to use with another heavy weapon. The handles can be trimmed so they meet flush with any of the heavies you have spare, then its a simple matter of green stuffing a couple of shoulder pads onto the arms, and either making a tripod from bits or just simply green stuffing some sand bags to rest the heavy weapon on.

The heavy weapon box is actually one of the best value kits there is simply because it really does give you so much more than just 3 heavy wepon teams.