I have instituted a sniper rilfe lottery on our server. It's something I have been thinking about and found the info here
https://forum.myrcon.com/showthread.php?4737-Insane-Limits-V0-9-R7-Player-Weapon-Permission-Lottery-%28not-SQDM%29
My time limit is 2 minutes to enter lottery and max 3 snipers per team any player can enter the lottery by typing !sniper into chat window...
If they use a sniper rifle after lottery is finished and slots filled they will be killed..
Just thought I'd pass on this to other server administrators here....