I have an M1a, which will be my next special project. It's a standard, nothing-special old service rifle I got at an auction. It cost me $950. I'm not so much concerned about the rifle's value going up or down. I'm kicking around what to do with it still, but I'm leaning towards getting some national match upgrades—sights, piston, trigger. But at what point is it smarter to just get a national match M1A? Like how much difference does a NM barrel make?