In order to successfully detonate TF2 dispensers you need a plugin. With all the recent TF2 updates, it’s getting more difficult to detonate TF2 dispensers. it worth investing the time learning how to detonate a dispenser in TF2. If you really want to create a devastating explosion, today is your lucky day, because we have the [TF2] Dispenser Detonator plugin installed on our TF2 server. Makes dispensers explode dealing damage to enemies within a radius. In other words, kill any enemies that stand around or near your Dispenser.
Here is what you do
Open the console and type: bind key “destroy 0” and hit enter.
Example: bind w “destroy 0”, with or without quotes shouldn’t matter. I did it with the quotes. Now go build yourself a dispenser, the higher the level, the more damage you will inflict. The credit for this plugin goes to: retsam, who is a veteran modder at Allied Modders.