I don't have a clue about the historical or numerical data on the PS rifles. But the ones I've seen from those arsenals are very clean and tight. Mine is from [0141] (mine is in the 22000XXX range) but unfortunately was a Bubba donor. It came in an ATI Monty with a receiver cove mount, 2 critical pieces gone forever missing. I did what I could to save it with a blank cover, Tech 200 site, Timbersmith wood and Romy sling. Looks good and functions great but still kinda bugs me that it's not correct for what it is. If I run across a nice blank pinned barrel side swivel stock, I might throw that on there with a bayo and ladder site and quasi resto it, but it would still bug me. More than likely I'll just replace the FSB with a bayo lug neutered job just to clean up the looks. PAX