I am building a AR10 rifle and I purchased this upper/lower: http://www.slickguns.com/product/aero-precision-m5-ar-10-matched-set-225

I've built several AR15 rifles but not a AR10 and I know AR10's are their own animal, anyways from my research it seems like the Armalite gas system might be better but I'm not sure if it will work on a DPMS style build.

If it matters I will probably have it chambered in .308, maybe 6.5 grendel creedmoor. I was originally going to build a 243 but I haven't read many positive reviews for the chambering in a AR10.

Edit to add: I am leaning towards a rifle length gas system and a 18"-20" barrel.
Thanks!

Last edited by TexasTBag; 11/18/14.
Despite my user name, no I am not from Texas.........