A select few here like to bash LWRC for the company they USED to be. The new ownership, from what I have experienced, have turned things around. I had a front sight that would not clamp onto the rail. I sent it back and they replaced it with about a weeks time total.
I shoot my 10.5 M6A2 upper every chance I get. It has a PWS TTO on it so it is loud, but shoots nice and flat. I have the 1 piece carrier so no keys to come loose. So far i haven't had any problems with it, but i only have around 1k through it. I finished it up November of last year when my stamp arrived. It is awesome on a FA lower as well, easily controllable. Eventually I will get a can for it, most probably a Brakeout/M4-2k.