Bought one some years back before they were ranger proof. AIM carried them for a year or two and it looks like the company rebranded or sold to Ranger Proof. It was a trigger shoe only back then. At the time there were not nearly as many options as there are now.
I really like the trigger, but do not use it as much as I did originally. It coupled with springs, disconnector and an over travel screw made for a nice 3lb, short trigger. I believe the shoe has different pivot points so that the pre travel starts at the firing pin block. So prior to the break, there is still travel but a good bit less than a stock glock.