I'm thinking of designing a back support type thing to relieve the weight on a soldiers arm. After watching that 'our war' thing on iplayer I heard some guy who'd been sweeping saying their arms end up hurting a ton, which means they end up having to take turns. It must also be distracting. I'd need to know the name of the model(s?) of sweeper(s) to get the dimensions so I can get in contact with a designer.
Similar type things have been made before. An example that you may be familiar with are the MGs from Aliens (see below).
I was maybe thinking something that would integrate with body armour. It just makes sense, to me; the arms are comparatively very weak parts of the body compared with the trunk, and the back. Why have the load on the limbs when it can be on stronger parts?
Nb; the braces from Aliens were actually based on camera-carrying braces similar to the sort below.