Quote Originally Posted by Reaperking386 View Post
My guess is that the one you get from the story was already armed/
More than that, 'Maggie' regains her weapon systems only through a sidequest where Jessie from the Ironworks repairs the magitek armour's damage weapons core - like the original repair job Wedge did to her though, she had to use a substitute component, which is why the weapons do not actually do any damage. Lore-wise, the weapon systems used on magitek armour probably exceed the maintenance and repair capabilities of Eorzeans, which is the probably the handwave why the gold, red and white magitek armours do not even have any.