Originally Posted by
Templar
The M1A is the semi auto M14 variant that Springfield Armory Inc. sells. They wanted to call it a M14 but ATF wouldn't allow it when they were introduced, so they went with M1A.
Firstly, you need to ask yourself what you want to use the rifle for. Are you wanting a clone of the USGI M14, a heavier barreled target rifle, a custom build DMR (designated marksman rifle), a shorter barreled carbine type?
Springfield Armory has a somewhat spotty reputation on current M1A's. This is mainly due to the fact that they ran out of USGI parts about a decade ago, so all their rifles are commercial grade. The earlier M1A's were built using their commercial receiver and mostly USGI surplus parts, and they have a much better reputation.
Armscorp also makes a commercial receiver, which a lot of knowledgeable M14 guys prefer over the Springfield if they're going to go with a cast receiver. Both Springfield and Armscorp are cast, the original M14 receivers were drop hammer forged like the M1 Garand.
Fulton Armory uses Armscorp receivers branded Fulton.
LRB are forged, and are about as highly regarded as they come. They are extremely well built, using premium commercial parts and GI where they can. Instead of using .308 Win. chambered non chrome lined Wilson barrels like Springfield, they use Krieger chrome lined 7.62 NATO chambered Criterion barrels.
You pay for it though.
So, what are you looking to do with it? That will go a long way towards where you want to look, and the features you'll want on your rifle.