PTR can give you great prices on shelfed lower guns and you can upgrade to a full auto carrier too. I also have a trigger pack in a SW89k that eats any ammo you feed it, very happy with that gun.
We're an 07/02 and just got an email from Cheryl Abernathy, email address kraee@hotmail.com offering suspiciously low prices. For those that don't know this is a scam someone has been running for a few years now. They'll even send someone else's FFL/SOT on request. Make sure you don't get scammed!
Your friendly neighborhood arms dealer