Salamander balance suggestion

So guys what im abt to say might sound funny but ima say it anyway 😹 so as we all know salamander ignores zm madness and thats the reason why its so good in tunnels unfortunately i don't have demo recording but yesterday as a last human i was in a tunnel and bought salamander when i ran out of bullets instead of reloading i just bought new one did that like 4 times so zombies couldn't even touch me withouth knife blink but out of 2k hp they damaged me like 200 which i think is kinda unbalanced because u can just buy and buy salamander there is no limit so i think if its possible for 1 player buy limit should be 1 per round ( not like gung 1 player= 1 salamander 2= 2 salamander ) also there is no rule for humans that restrict them buying guns and also as we all know salamander is really good against snarks which is making it broken in a tunnel ( i know its not a good gun to farm and stuff but for survival its too broken if u use that method )