While I agree with most of this, I think you could build a better rifle with $1500.
I'm with ya Jakerz, I was just under the impression that he wanted to snap an upper on a lower. I just finished a Noveske build. I'm at $1250 with sights, no optics.
Noveske gen 2 lower
Alg trigger
Spikes st-t2 buffer
Badass Ambi safety
B5 stock
Noveske upper
BCM bcg and ch
Spikes 14.5 barrel
Rainier arms 13 inch rail
Rainier arms comp/flash hider
Magpul mbus