I bought this upper, came yesterday. I'm planning on taking the rail off checking barrel nut torque, re-torquing the 4 Allen screws that secure the rail to the nut and checking the gas block screws toque.
I can't find any specs for the torque on the rail attachment or the particular gas block as well as any one have a suggestion or an order for torquing on the rail attachment.
its got the light weight key-mod PSA brand rail.
I guess if I cant find anything ill got with 50-in/lb on the rail screws.....