I have a sneaking suspicion that the stocks were not made at the same factory the guns were made....due to the triangle arsenal stamps found on some that never match the factory the rest of the gun was made at. It would seem to make sense to not transport logs all over China. Usually mills are located near to the forests here, you can fit a lot more board feet on a truck once processed vs. logs... Our (formerly) logging community sports a mill at the confluence of two major rivers on one side of town, and also (formerly) a pulp mill for paper products on the other side, and down river of town. I would speculate you could fit three truckloads worth of logs into one truck of finished stocks.
One might think /26\ made their own stocks, and based on the size and scale of that factory...they might have, although my oil finish /26\ 65 has the non matching /\ stamp. You can generally locate replacement unserialed stocks of most any variety...usually in the orangeish range of color....the blade variety are far less common, short lugs are a pain to find...but they are out there. Try finding an unserialed long lug spiker sometime! I have only seen one, on my 64. So to me it seems as if stocks were made both for the current Chinese scheme and possibly older versions were made for refurbishment purposes....many years after those types of stocks were eliminated due to Chinese 'improvements' to the design.
It makes you wonder though, why so many years after the M21, that /26\ spat out inverted take down levers/stocks....possibly using up old stockpiled stock....stock? (and levers). Meanwhile all the other factories at the time were using the normal stocks/levers. Or perhaps in the lull at /26\ in the early 70s...they sat on M21 parts until production began again? I seem to recall that by 80 they were back to normal stocks/levers...perhaps as surplus was used up, they reverted back to normal...or at least what all the other factories were making at the time.
Occasionally you will find unfinished stocks, lacking all hardware for sale. Which leads me to think that until final assembly...they were just stored until needed. GM's extra hogged stock is a first to me though...perhaps there was some additional work done during fitment of an almost right stock that was on hand.
I wonder if the Chinese knew about Occam's Razor? They sure kept things interesting for future generations to reverse engineer their logic.
Nice carbine Martin08! I trust a cleaning rod will grace it's presence soon?
I dig the dog collar Chinese sling. Does it have the TYPE 56 in the stamp or could these be remnant T53 slings? They seem a little cumbersome, especially for a side swiveled stock. Swivel placement is another thing that irks me...it seems like there might have been a reason to alter that aspect, only to revert again later.
It seems every time you think you know about all there is to know about these things, some other oddity is noticed. It's like assembling a jigsaw puzzle with the pieces face down.