I need to put a butt stock, buffer tube, etc. on my build and want some advice on whose butt stock, which buffer tube size, and the advantages of a kit vs buying each component individually.

I'm going to use this lower mostly for prone shooting with a 20" bull barrel, DI upper. The lower is polymer unit from New Frontier Armory. Mostly a varmint gun.

any help you can offer would be appreciated.

Get the Stag arms A2 stock kit

PSA and DSG Arms have good stock kits.  For a 20" i to would go with an A2 stock. If you go with a collapsable, get a milspec tube.

Good luck with the polymer lower.

Thanks guys. Great info. I'll report back when I get it together.