I have seen from a number of places online about a leak from the atf- the notice gives officers direction to confiscate FRTs from gun shops. I don't know that this has been confirmed by the ATF but I think it is important to be aware of. I don't have an FRT but I sure want one after this drama.
I saw this today too. If this really goes down, you better have paid for that trigger with cash. Preferably second hand. It essentially speeds up the reset, making your gun able to fire more quickly.
That does look like a fun way to burn through a lot of ammo quickly. Like you said, cash and no trace. Just heard the guy in vid say what he paid for it...whew!