What would be the best 308 upper/or lower reciever i could buy for $600?

[x22]

Any suggestions?

[Robocop1051]

Almost all of them, stripped...

SI Defense, MEGA, and POF are my personal favorites. I like Kaiser and JD a lot too, but Kaiser has been near nonexistent and JD is having a bit of legal issues.

You could go quite a bit cheaper with forged receivers vs the billet.