There are not enough og weapons in the server, here are some of my suggestion so that we got more variants in weapon options
1.Skull 5
An og cso weapon that was a solid pick on the old days maybe accesible around lvl 45~

2.Gatling (Volcano)
One of the oldest weapon but was cool gun regardless, maybe around lvl 40~
https://zombie-mod.com/11386%E2%80%94cso-gatling-volcano.html
3.Thunderbolt
Was one of the best pick on og cso, would be good around lvl 80~
4.Gae Bolg
A good utility gun for jumps or a big pushback with high reload speed, Should be extra in 100+
5.Ripper
Good utility weapon for knocking enemies and doing decent damage, Should be extra around lvl 85~ not to be confused with in game chainsaw which gives armor
6.Black Dragon Canon
Just the old black dragon canon because the red one is not classic, should be good around lvl 70~

Extra
1. The survivor model in the server best fit the classic zm3 hero (Max Thacker) model rather than choi ji yoon model -> i think choi ji yoon model is better as a human model instead.