I am wondering what barrels Armalite uses on their AR 10, 260 Rem. I e-mailed Armalite and their response was that it's on their web site. Darned if I see it but it really does not matter alot since I have had one on order for about 5 weeks now. Just wondering or worrying if it's going to shoot. However I am getting AR15 Barrels to work some of their magic for me. Anyway, thanks guys. Shoot straight and shoot alot !!!