I've had to use one more than once, and I agree, it's a fine pistol. And it's such total nonsense that it won't run in the sand. What it's won't do is function in the all-too-prevalent environment in the military called NEGLECT.
The 4563 you have has the ugly *** billboard, but a green scrubby and that vanishes. Seriously, it's laser etching, not a rollmark, and it comes right off. My 5903TSW had the same thing and it is a thing of the past.