At the moment, though, the carrier doesn’t appear to be available separately. AA is selling it with their P Series Adjustable Micro Gas Block for $359.99 or with their P Series Micro Gas Block for $274.99.
My go-to upper since 2012 has been an Adams Arms piston system, and I have nothing but good things to say. It’s reliable, clean, and accurate. Last week we saw a base model variant hold up pretty well to IV8888’s abuse. So, this is good news for lefties!
In other news, basically everything on the Adams Arms website is 10% off for the Labor Day weekend.