How is it select fire? The lower in the MP5 doesn't determine the modes of fire the trigger pack inside does. Despite how the lower is marked a semi auto trigger pack (which is the only one that will fit that lower since it's clipped to clear the semi-shelf welded to the receiver) will be safe-semi-semi-semi.
Also after looking at the auction again that is NOT a pistol. it has a front grip on it and there is no stock so he created an illegal AOW and is violating the NFA. Oops!
Also after looking at the auction again that is NOT a pistol. it has a front grip on it and there is no stock so he created an illegal AOW and is violating the NFA. Oops!