Kevin from United States, VA Public Profile

Upper is cool, seems like a decent quality piece.
The only real issue I have with it is the picatinny adapter that it comes with.
The part that holds the stock rail to where the buffer tube usually attaches is a threaded plastic piece with a metal rail section.
The threads on the plastic bit cross threaded for me and stripped the threaded portion which ruined the piece.
In addition when the plastic portion was fully seated on the lower it would not allow the upper to close/attach onto the rifle (using aero lower). It stripped the threads off after trying to adjust this unfortunately, It just stuck out too far into the lower to let it close.
Would be a good idea to order a new all metal rail adapter along with this upper if you plan on purchasing.
Not a huge deal just sets back my build a week until the strike industries picatinny adapter comes in.