I'm looking for a quality lower to use for an AR build I'm planning. It's more of rather buying a lower and upper, and pinning them, than a full build. If I have to, I'll assemble a lower. I'd love an LMT with SOPMOD stock, but can't find one in stock . NW Armory has stripped Noveskes for $189, but I'd prefer a factory built lower. Does Colt sell just receivers? I want a well know, quality NAME brand, no Aero, Anderson, Mega. What should I look for? $200 max for stripped lower, $550-600 max for complete.