[wterrell]

Ron,
Could this be a combination of two commercials? One an AE and the other a domestic commercial? The only item you would need from the AE would be the cannon less the barrel and toggle assembly.
At the point of assembly, you have a rare, out of sequence AE test.
Where is the flaw in my scenerio?
This could be done at both ends of the serial range.
As per the picture, the barrel appears to have been wrenched.