Who the heck wants to sell a lower anyway?
If somebody wants to FA-10 a stripped lower they're transferring to me, I'll buy from somebody else. And when selling, given the gun unfriendliness of this state, I'll always want to see a MA license or FFL, and get bill of sale / receipt for a federally defined firearm that I'm not going to file an FA-10 on. If somebody doesn't want to buy from me because of it, I completely understand.
If somebody wants to FA-10 a stripped lower they're transferring to me, I'll buy from somebody else. And when selling, given the gun unfriendliness of this state, I'll always want to see a MA license or FFL, and get bill of sale / receipt for a federally defined firearm that I'm not going to file an FA-10 on. If somebody doesn't want to buy from me because of it, I completely understand.