Thanks for the photo. Do you know what their mission/purpose was? I’ve always wondered.
This particular one was used for perimeter defense at LZ Stud where I took the picture. There was this one and maybe more that were moved around a lot, to confuse the NVA I suppose.
One had move up near our bunker/hooch one night without us knowing and scared the bejeesus out of us when it cranked off a round. The backblast was unreal.
The .50 cal spotting rounds were cool, see the tracer arc out, and then be followed by a huge 106mm tracer following the same trajectory and hitting the same spot.