Not saying it was the same for carbine stocks...but I went through 4 NOS scant field replacements, sending them all back with some sort of serious defect. They all came in original packaging, with gov. contract number printed on the side. First one had a mag cutoff recess that went all the way down to the bottom metal, second had a straight but way off-center inletting (obvious in the barrel channel and around the trigger), almost 1/4 inch off center. Correct width, but right side of the mag area was very thin. The third had almost 1/4inch extra gap behind the tang. All three came in their original packaging with the gov. contract number on the box, unstained. This discussion is starting to confirm my suspicion that the otherwise reliable retailer landed a pallet of factory seconds. The stained NOS scants at Numrich seem to be all Keystone. The inletting looks like it was scooped out by a spoon, but the fit is pretty spot on, with just enough room for minor finishing.
I once bought three factory fresh grooved lower bands. All in cosmo cheese cloth.
Deep black, you could tell they had just barely been abrasive blasted before mang park.
No machining lay to be seen and only a slight surface mismatch on one surface. Drop-Ded-Gorgeous.
Each one had their bore .010" oversize
I bored them oversize, pressed in a 4140 bushing, fusion welded with the TIG, and then re-bored to .001" under the journal size of my barrel.
now there is an idea. My new bubba'd Remington m1903 has a rare R stamped milled lower band whose screw was stripped. My plug with a bushing, solder it (I don't weld) to hold fast, and tap the correct size as opposed to tapping for a larger screw. need to measure it first I suppose.