I built a DPMS ar10 about 2 months ago and I love it. I haven't had any trouble with the 19rd mags. The only cons I can think of is the price of ammo.
There was someone selling one for around $900 on a forum....i'll try to see if I can find the link.
There was someone selling one for around $900 on a forum....i'll try to see if I can find the link.