Read before purchasing - Troy Ambidextrous Magazine Release

I, like many have heard a lot about this Ambi mag release “it’s one of the best on the market.” But no one has yet said to be cautious when buying for your billet lower receiver, luckily I’m working on another build which is mil-spec and works great. But for the billet lower it does not function properly. So please before spending the money because it isn’t cheap make sure your lower is mil-spec other wise it’s a 50/50 chance you are risking of this particular Ambi mag release working properly. So 3 stars for me it’s cool but I’m disappointed with the end result. (In case you are wondering ATX armory, ADONIS lower receiver is what I originally purchased this for.)