What Simon said.
Also, do you plan on using a scope/redDot, or the iron sights? If you plan on using the iron sights...the upside is they are among the most useful and very best design of iron sights on nearly any rifle (except maybe some of the precision Swiss vintage rifles? I'd guess they are also great). They are adjustable for windage, elevation, and also have a quick dial to select a distance in Yards and that'll give you the proper bullet drop for that distance. But...the rear iron sight parts as they come from China seem to be of a substandard metal, and don't seem to be heat treated. They'll work...but after a while the gears will likely wear out. So, what you do is replace the rear sight assembly with one that's known to work well: Springfield Armoury, some other Yankee products, or the Italian guy who's selling genuine BM-59 rear iron sight assembly for a reasonable price ($80 or something?!). BM-59's are postwar Garand copies made by...er...Beretta I think (that's a very good thing BTW), but removable box-mag and in 7.62Nato. They would be as high quality as you could get anywhere.
Personally, two weeks after buying my M-14, I saw a package at the store for Springfield's National Match sight set, which also included a narrower front sight blade assembly, and the rear sight had a tighter aperture hole as well as a nice rounded "hood"...which is what I prefer. How well do they work? Well, I've not done any precise measured tests for group size...but I can tell you that with those iron sights, cheap-ass Russian MFS ammo, and a cleaned up trigger, I'm able to put 20 out of 20 on an 8" steel plate at 200m, and do it fairly quickly too. And that's with the factory stock too, and factory spring guide (I bought the upgraded spring guide since then). I'd bet some handloads would do quite well.
