Because it was modified to comply with law in order to be sold to civilians...
but it is NOT a different design, which is why it is called a "variant".
Do you know what "variant" means?
Modified is the wrong word. The inner workings that made the M 16 a battlefield had to be completely redesigned. You had inner workings that were completely different in a shell that looked like an M 16. Again, back to appearance
BV is in question time out indefinitely, until he takes the pledge to answer questions one for one.