cscommands.comparticle_test_attach_mode
Possible Values: 'start_at_attachment', 'follow_attachment', 'start_at_origin', 'follow_origin'
For this command to work you must first run
sv_cheats true in the console. It only works on a local map or a private server — not in matchmaking. sv_cheats is a built-in Valve command and is completely safe from VAC.