The best price seems to be from Palmetto State Armory. They sell complete lowers, uppers and rifles. They had some reported early teething problems but most reports nowadays seem to be pretty good to excellent. Windham makes nice rifles. There are many others. Just don't expect much interchangeability with parts, or uppers and lowers as there's no 'standard' to follow. There are Armalite and DPMS patterns but no standard.
