I'm a Range Safety Officer at a public outdoor range and we, like mentioned above, have a no 'rapid fire' rule. Occasionally someone will start dumping mags at what seems like a "bump stock" rate....not full auto, but fast. I have to go over as ask them: is it full auto; is it a mechanical trigger or stock gimmick of some type; or are they just seeing how fast they can shoot. I look at their rifle (usually an AR style), and when I can see they're truthfully answering no to the first 2 questions and yes to the third, we have a talk. It goes like this, "Now that you know you can shoot fast, you can stop, or take choice 2, pack up and come with me and I'll give you your $15 range fee back before you leave."
They read and sign the rules when they come in, and we require compiiance. Not sure, but I think your trigger may still be legal while the court fight goes on, but I'd ask if rapid fire was OK at the range if I were you.