To end the discussion. You have just answered a question inadvertently that you have refused to answer for days. The question was are you discussing the Armalite Rifle 15 that became the M16 OR the original SP1 that paved the way for modern day AR 15s.
You just posted NOT FULLY AUTOMATIC. So you are discussing the latter. Meaning it is not an assault rifle by definition and was not designed for the battlefield.
There may have been basically ONE design for the Armalite Rifle 15/M16 but the SP1 and later day AR15s are not that design.