For those who wonder why I sent a sample to ATF, here is why. I did a Calif. compliant lower back in 2000. I started with ATF Tech Branch to get their determination if the design met the parameters of the law, in their opinion. It has been my experience in the past that they look at it from a mechanical, Technical perspective. I spoke to the same agent I spoke to back in 2000. Without going into detail, there are modifications they feel are too easily reversed, and ones they consider permanent. From the past experiences, I have a pretty good understanding on what they will require. If I don't get it right the first time, I will redesign until I do. Once I have a favorable determination, I have a name and number of a CLEO in NY who I will contact and send a sample to as well. Without a determination from ATF first, you are just spinning your wheels, they won't even consider you. On top of that, I have 5 AR15.COM members, from NY, that will be receiving samples to do with as they please. I am sure from some of their past posts, they will have no problem pointing out any flaws or quality issues. I have been down this road before, and it was no picnic here in Calif. On top of that, every one is leary, not just about legality, but quality of product as well. Just trying to go the distance to ease the worries. Craig