[Milsurplus] mast poles

[Ray Fantini]

I went to the Howard County ham fest last Sunday, nothing like Dayton but a lot closer. Did see an ARC-5 receiver and a rack mount HP-608 for $10 each, along with the same broken PRC-174 that was at Timonium, looks a lot like a PRC-104 and am told that broken is there natural state.
But the question I have is about mast poles, the same company was at Dayton selling lots of aluminum and fiberglass mast that are OD green. Hams buy these things by the truck load and call them military mast but I have to wonder. Did the US military ever use fiberglass poles? And I thought that all the temporary mast I have seen like the AB-952 and the like were heavier construction. Is there a huge supply of third world substandard mast on the market or is this what the last of the mill spec kits were?
Ray Fantini KA3EKH