The reproduction AT-AT chin guns for the Kenner 1980 Imperial Walker are nearly identical to the originals. There are some differences here is how to identify them.
Original is shown on the top on all photos.
here is what to look for.
The original chin guns has a frosty look to the front of the cannon-the round hole is also distinct and deeper. On the repro version the front is the same gloss consistency as the rest of the cannon, and the round hole is rather shallow.
The body of both are near exact. the only other difference is as the end – where they bend to catch the light forth lightbulb.
– On the vintage one it is rounded, and looks polished – where on the repro it looks more cut-
All in all the repro guns look excellent. although to the purist, this should help you identify a reproduction.