The Palm Cannon is Iron Man's signature move and your third mode of attack when battling enemies, after the thumb trigger and deploy button.
To activate the Palm Cannon:
- Place the Repulsor on your forearm behind your wrist.
- Hold the Repulsor out straight; use your other arm to brace the bottom to keep it stable.
- Flex your wrist up and push forward. Make sure the strap along the bottom of your wrist pulls out from the Repulsor.
If you're having trouble activating the Palm Cannon, try pulling the bottom of the Repulsor toward you with one hand as you flex your other wrist.