That's a modified game executable, not a console command.
Note: There is no built-in single client console command in vanilla CS 1.6 that simply “turns off recoil” for legitimate multiplayer play. cs 16 no recoil console commands hot
These commands are commonly used in custom configurations like the Legit No Recoil Config to help center your shots and reduce the erratic "jumping" of the weapon model. That's a modified game executable, not a console command