To use grenades in Command Authority on Roblox, you usually need to equip them first, then place or throw them using the game’s grenade control, which is often a dedicated grenade icon or throw action in the UI. In similar Roblox strategy/combat games, players commonly select the grenade item, aim at the target area, and confirm with a click or throw input.

What to try

  1. Open your inventory or loadout and make sure grenades are equipped.
  2. Select the grenade item or grenade button.
  3. Aim at the spot you want to hit.
  4. Use the throw/place input the game asks for, usually left click or a similar confirm action.

If it does not work

  • Check whether grenades must be bought, unlocked, or equipped before use.
  • Make sure you are not still on another weapon or fire mode.
  • Try clicking on the ground or target area rather than on the unit card or UI panel.

Quick note

There does not seem to be a single official public guide for this specific Roblox game in the sources I found, so the exact control may differ slightly from other grenade systems. The safest move is to look for the grenade icon or prompt inside the game and follow that control scheme.

TL;DR: equip grenades, select them, aim, then use the game’s throw/confirm input; if it fails, buy or unlock them first and click the ground/target area rather than the UI.