I know I am most likely an enabler on this so I am sorry in advance. But as a prior LE who cares about a non firearm marking. IF they would take off all the other laws that cover these air arms I think this would be ok to mark them when off private property with a slide on cap. Not all LE are quick to understand new law and some don't want to. But here when they took all firearm law off air guns this notice , on the muzzle made my interaction a non issue With the Co/le I ran into. (this is not required here I just did it) He was on the ball and knew of the new non firearm policy. As An old officer I used to smack some dumb @@@ kid for pointing a bb gun at someone, BUT I/we can't do that anymore. Some of the air guns out there look real. I am on your side and think you should fight this there, mostly because of the other dumb laws they have there. Good luck and as a life member of NRA I will e-mail them in your support.