Already thought about this. Make a twin engine airplane. Have two aegs in the nose and a bombbay door full of bb's or something. ME 110
Like made Man said. One hicap and you can consider it gone. Balsa wood doesn't stand up too well against fast moving bb's. And these models are not cheap.
As for the recon aspect..... go for it. You build it and i'm sure it will be used. Just fly high and fast.
Make a SR-71 model.