Random weapon firing in FPS

[iamtim2]

I have a new Macbook Pro 16", 8gb 5500M graphics which is great for some casual gaming on the road. I have a problem that is driving me mad. In FPS games, the weapons seem to randomly fire or continue firing when not pressing a fire button. Games I have played are Sniper Ghost Warrior, Battlefield 5 and Call of Duty WW2 and the problem exists in all games.
I've used Bluetooth mice (MX master) and wired mice and the problem is the same. With the wired mouse, I've disabled Bluetooth to rule it out but no joy.
Does anyone have this issue or a solution. It is really annoying trying to sneak around with constant inadvertent negligent discharges!

 

[konqerror]

Are you using the internal keyboard? Perhaps you're accidentally clicking with your palm.

 

[iamtim2]

I am using the internal keyboard but definitely not touching keys when the weapons randomly fire

 

[konqerror]

You could try with an external keyboard to eliminate the trackpad.

 

[iamtim2]

I'll give it a go