I built a P80 a while ago with the Brownells slide and an RM07 Type 2 w/6.5MOA and Silencerco threaded 9mm barrel. Turned out great, no issues at all. I haven't shot it a ton but I agree with the points made so far. It takes a LOT of training to find the dot quickly. I might try a different RDS but the RMR is the benchmark.