Not that I saw every thing in Nam by a long shot, but what did you attach a suppressers to. The only thing I saw suppressers on were M-14. Now I carried a CAR-15 and a 1911 45. There wasn't anything to attach a suppressers too. Most tunnel rats used a 22, 9 shot revolver if they could get their hands on one. I used a 1911 45. The other is that would create a very long pistol or revolver, which would be hard to use in a tunnel. Or at lease the one's I went down. "D" Troop 3/4 Cav, 25 Inf. Div.. 1969. And yes I was a combat medic too. They were called tunnel rats at that time. I was call the crazy medic. Somebody had to go down. Almost nobody would. Only the few and the crazy did.