In the console I can see this
CMaterial::PrecacheVars: error loading vmt file for models/weapons/v_models/hav0c.m4.mullet.darkelfa.hack.anims/shell
CMaterial::PrecacheVars: error loading vmt file for models/weapons/v_models/hav0c.m4.mullet.darkelfa.hack.anims/mag
CMaterial::PrecacheVars: error loading vmt file for models/weapons/v_models/hav0c.m4.mullet.darkelfa.hack.anims/other
CMaterial::PrecacheVars: error loading vmt file for models/weapons/v_models/hav0c.m4.mullet.darkelfa.hack.anims/right
CMaterial::PrecacheVars: error loading vmt file for models/weapons/v_models/hav0c.m4.mullet.darkelfa.hack.anims/left
CMaterial::PrecacheVars: error loading vmt file for models/weapons/v_models/hav0c.m4.mullet.darkelfa.hack.anims/ris
CMaterial::PrecacheVars: error loading vmt file for models/weapons/v_models/hav0c.m4.mullet.darkelfa.hack.anims/fixorbarrel
CMaterial::PrecacheVars: error loading vmt file for models/weapons/v_models/hav0c.m4.mullet.darkelfa.hack.anims/silencer
A solution ?