I'm very confused about all this hubbub regarding pre and post ban. I understand the legal differences, but what I see as the differences include a narrower mill out in the lower so an auto sear cannot be inserted. now in several magazines ive seen three shot burst trigger kits that are designed for the a2 how does the presence of the sear function with a burst. I personally thought the sear was there to keep the trigger from locking up and therefore limiting select fire to semi. or is this one of those questions you just dont ask?