I dropped by Thunder Beast Arms' booth during the SHOT show to ask about their muzzle brakes and suppressors and they mentioned that their products are "immune" to a common problem encountered with many suppressors, namely point of impact shift. Ray talked about POI shift when removing/attaching a suppressor and the same issue as the suppressor heats up. The QD variants are supposedly the biggest offenders. The guys at TBAC are experienced long range shooters and competitors so their requirements are not necessarily those of the average shooter. However, I'm curious if anyone here has any input on this. What suppressor do you own/use and have you seen or experienced a significant POI shift due to heat or removing/attaching the suppressor?