Gunshields are made with wooden swizzle sticks, paper and superglue. The real thing was stakes in the ground with branches woven in between, but this was a bit easier and quicker to realize. I did it with the first decoy gun and the wood weathers nicely.
I made the gunshields so they fit the gun as good as possible, then glued them down with wood glue and some sand. Paper and superglue holds the different planks together.
Drying as I am typing this, they will be ready for a dust off and green basecoat in the morning. I'll only flock my own, the ones I'm giving away will be unflocked so they fit in better with their new masters.
Btw, here is the original picture I'm working off: