I need to know if I can legally use a 16" 9mm upper on a newer standard receiver, bought as a receiver (not rifle or handgun), and with a Hahn mag adapter? Other than the 16" 9mm upper, I would only use heavy barrel uppers, such as an nice old Bushmaster 20". I have some older receivers (rifles, actually) I'm sure I can use it with, but am wondering about its use on a post 2013 receiver. I'm not aware of the military using 16" 9mm ARs, and the newer lower receiver is not marked Colt or Bushmaster (evil, evil, names in themselves).
If you happen to know the rules or laws that govern this, please post them.
Thanks in advance!
If you happen to know the rules or laws that govern this, please post them.
Thanks in advance!