So I have an AR-10 (not an AR308) that I've been kind of sitting on for a long, long time. This is a "B Series" Armalite pattern Noveske N6 build. Back when I bought it, complete uppers were very hard to find and the AR308's by DPMS were just coming on the scene that used their own mags and were not AR10 patterned lowers.
I have a 24" heavy target upper on it, but have wanted something shorter for a long time, this one is a heavy son of a bitch... So I got a hair up my ass yesterday and started looking around. Fuck... Armalite has all but stopped making any "B Series" uppers and components. This is the shit that has been around since the AR-10 was invented... They have jumped ship to the polymer magazine setup and DPMS AR308 types, or their new "A Series".
Anyway, googling for hours to find an upper, I was just going to find the parts to build one, but I stumbled on a site that claimed to have some B series stock. Sent and email and 1 minute later I had a reply with a phone number. Called the guy and got this 18" upper that MSRPs at $1499 for $1100. Shipping out today and I should have it in ~5 days:
https://armalite.com/shop/ar-10-b-serie ... -assembly/