I like it, just have to remember only the tritium dot glows without a good light charge. I have a scout pro on my M4 so if I flash that on for even a second the glow paint is good to go and gets pretty bright for any amount of time I would need it in a real world defensive setting.
I like what you have there. It’s different than the majority of M4s. However, the only sensible solution is to get a black M4 and keep the H2O as well.