I'm sure... his understanding of physics is amusing though...
Note: "Besides the barrel in the photo is MUCH shorter than 22", or the can couldn't possibly handle full charge .50 bmg ammo."
With a shorter barrel, more pressure and gas expansion has to be countered by the suppressor. Basically, his understanding of how a suppressor works is exactly opposite of reality. The longer the barrel, the easier it is on the suppressor. Oh, and if the suppressor is properly made, it doesn't matter what barrel length the gun is, the suppressor will handle full power loads. I know both of mine will.
Basically Gunkid, The longer barrel allows for complete powder burn and the pressure spike is on the waning side before the bullet gets to the muzzle. If you shorten the barrel, you get more pressure and the can has to deal with more burning powder and higher temperature gasses.
Mike