May I ask what are you going to use them for?
Like them and they could be used for alot of different games.
I can see them being used with many sets of rules like 5150 or Stargrunts. Myself I think they would make a great company asset, coming under the direct command of a squad leader. I see them being used more as a support weapon taking the roll of the modern HMG. Having the ability to go on over-watch or manning strong-points of a defensive position. I am actually the manufacturer of these, so I am open to all suggestion as to their use and which other rules sets they would fit in with.