Quote Originally Posted by ccdjg View Post
Are these points enough to raise its status as a Gat prototype from a slight possibility to a reasonable probability? Or am I reading too much into this?

Your comments would be very welcome!
With the greatest respect there is no provenance to suggest it's status is anything more than a homemade project apart from a few similarities that may or may not have been copied from an original.

It could equally even be a competitor's prototype...?

Without any provenance, I don't see its status being anything other than an interesting curiosity.