Ok got the lower receiver built and mated to the upper. The parts kit came from Blackthorne products. The lower is a stripped by Spikes tactical. The whole build was under 600. Took it to the range today and put 120 rounds through it and it worked flawlessly. Only got to shoot at 30 yds as that was the only distance this range had. Cant wait to get it sighted in for 100 or maybe 200 yds.