I did a search and I could not find anything concrete. I realize there were several "batches" of M14 over the years. I've even owned 2007 Marstar batch that was pretty good, deplorably I had to sell it for one reason or another.
Which batch, in your opinion seems to be the best one in your experience? I mean which batch of M14s (either Norincos of Polytechs) had the least trouble with badly indexed barrels, soft bolts, badly locking bolts (that needed lapping), chambers that were too generous, crappy choo wood etc. My 2007 Marstar M14 had pretty bad index which needed a little work but was pretty good in another respect, oh yeah, it needed many shims to tighten up the gas system. I like the ones with black synthetic stock and bayo lug.
Which batch, in your opinion seems to be the best one in your experience? I mean which batch of M14s (either Norincos of Polytechs) had the least trouble with badly indexed barrels, soft bolts, badly locking bolts (that needed lapping), chambers that were too generous, crappy choo wood etc. My 2007 Marstar M14 had pretty bad index which needed a little work but was pretty good in another respect, oh yeah, it needed many shims to tighten up the gas system. I like the ones with black synthetic stock and bayo lug.