*EDIT: I finally solved the problem by giving him two of the helmets, apparently he's picky like that

Okay, so I've been trying to reverse pickpocket a zero weight bound helmet onto M'aiq so that I could get his hood (the only one in the game), but for some reason he just won't equip it, so I can't take the hood from him. I've even tried beating him up :wallbash:

Can someone please help me?

You might have to use the CS to get it on him, maybe try dropping a helmet on the ground and attacking him?