addons/amxmodx/configs/csdm.cfg
;List weapons here the bots can randomly have
;The short name must match one in the list above
[botsecondary]
[botprimary]
(make empty these sections - so bots will not use any primary/secondary weapon).
Potential problem - they still can buy a weapon in buyzones.
Solution - play with them on aim_xx.map (or other maps with weapon strip entities).