Been there done that. There is no hammer spur for the Apex. Think about it, if there was a hammer spur, you would not be able to drop the action and prime it. That's why they dont have one for it. At least that's BPI/CVA's answer to the question.

I've thought about designing a swiveling spur that could be attached to the hammer so it could swing out of the way when dropping the action but have not had time to dig into it.