Great article on building your own AR...

[Te Anau]

Not that I intend to do it anytime soon,but thought this may help others.

http://www.guns.com/bargain-hunting-complete-your-own-ar-stripped-lower.html

I love this part
"First up, you probably want to know who makes a good stripped lower. There are quite a few brands out there and we have to mention, because the lower isn't a stress part, that picking the right one comes down to preference, and if your preference happens to be whatever is cheapest, we won't hold it against you."

 

[RT]

That is a pretty good article but the quote should read "picking the right one comes down to preference, and if your preference happens to be whatever is the cheapest forged aluminum lower, we won't hold it against you."

 

[Crow Hunter]

And that fits the magazines that you want to use.

PMAGs are larger than aluminum mags and if you have a smaller than spec magwell you might have problems if you use PMAGs.

And that has in spec pin holes so you don't have to use use KNS "anti walk" (out of spec holes ) pins.