I too saw these two Armalite reproductions. Here's a quicker way to make sure you are not fooled by the reproduction.
Look at the cross guard. The Real Armalite M7 uses a WWII style cross guard. The repro is simply a regular M7 cross guard.
The cross guard on the right is the Imperial/Colt M7. This photo comes from William Humes' website.
Marv
