[quote=CirusArvennicus]
No, they don't. Justin Law was a Death Scythe, and as such, is an exception. The Golem had part of Arachne's soul, which must have been the soul wavelength Giriko used.Demon Weapons cannot use their own Soul Wavelength in combat.I choose to ignore the part of the anime that says Maka has demon weapon anything. How can you be HALF weapon when all weapons come from one made by Arachne?
[/quote]

Her father was a weapon, remember? She was the child of Spirit (A Death Scythe) and the woman who I learned the name of once but forgot (A Meister). Therefore she has Meister blood from her mother and Weapon blood from her father, allowing her to fill either roll. Since something like that hadn't happened before, they assumed Maka could only be a Meister since her weapon blood was dormant.