If your refering to the one tank atop the TOC bunker, it knocked everything down to the floor. There was a basement/radio room under it. How it was constructed I didn’t see, or just don’t remember. I was there about forty minutes max. There were two or three antennas mounted on telephone poles still intact. The hooch walls were similar to most places in they had sand bag walls with a tin roof. Maybe a three foot gap between the sand bags and the tin roof. The gap was screened in with tarps that could be dropped in heavy rain. Suspect the TOC bunker was just sandbag walls with some kind of a roof. The concrete was poured by Navy Sea Bees or Combat Engineers, Probably Sea Bees, as they did a lot of work at the other base camps for them. The one thing about A101 that surprised me was how flat it was. Everything around it was hills and mountains! It sat on about a 10 degree grade.
In that era and with SF Strikers, the weapons seen were a mixture of Korean War and modern equipment. They really liked the old Browning 30 caliber machine guns and the BAR. You also saw quite a few M2 Carbines and M1 rifles in use, yet you might also see an M60 used right near it. They used whatever they could lay their hands on. Lots of M72 LAW's and even a Thompson sub machine gun every once in awhile. Recon teams have been known to use a highly modified RPD, instead of the M60.
gary