Modded Controllers are they legal
It's a mixed bag. It is illegal. However, adding chip components to an existing Microsoft or PlayStation controller is considered an upgrade or a modification. That's the loop hole, so yes it's illegal, but if your just upgrading it's not a mod.
There legal but people say there not just because they don't want you having an advantage.
Yes they r legal but idiots file complaint u and u get banned but definetley dont use it in mw3 cuz people get banned a lot in mw3 they are great in mw2