I know all 320s were supposed to have a thumbhole stock, and it's hard to say from that picture, but it sure looks like the third 320 I've seen with a stock like that. I owned one, it was long since 922'd and sold. There will be a bracket bolted to the receiver. The stock will be held to the bracket by two allen head machine screws. The butt plate is hard rubber/plastic, and the stock will show typical Chinese build "quality", such as lacquer over the buttplate. The area that should be the thumbhole portion of the stock will have the same very Chinese finish quality as the rest of the stock, and that area will be rather flat compared to the curves of the rest of the stock.
Additionally the pistol grip panels will look like they were molded in tooling with, again, the same "Chinese quality" as the foregrip panels -- such as poor consistency of ribbing, some ribs seemingly the wrong length, etc.
Yes, I know and fully understand that these were _supposed_ to be imported with a thumbhole stock; I also know that under 992(r) it requires one. It is curious to me that this is the third of these I've seen with the same incorrect stock -- apparently 'cut' the same way, with the same attaching method.
It would be interesting to see close-ups of the stock to see if it has the features I've described. I'm not claiming that some were imported this way; there is insufficient evidence for that to be anything other than conjecture. Perhaps someone stateside modified a number of these? If the "missing area" of this stock is the same as the two others I've seen, I find it highly unlikely that three "bubbas" just happened to do the same dremel mod.
eace
