Decided to put it on my "Many Brand" M4ergery for now and see how it does. It's yet another one of those builds that I wanted to keep super cheap at 1st, but keep adding good stuff to it to the point where it is a badass little carbine now. The barrel was the last component that was lacking a little, so this should solve that. But have no fear. I put together the start of another super budget one on Christmas Eve with spare parts and an Anderson Lower AGAIN ....... UHG..... Lego guns i swear. Love it though.