I work on leo m16's all the time. One of the guys asked me where they could find and buy a transferable full auto or burst receiver they could build up. I explained to them they would need a lot of money if they could find one at all. Knowing that curiosity killed the cat ....Where could you find one? I know you need a class 3 guy to work through and do all that government stuff. I would like to know if anyone knows if you can still find them and what they are going for???? I have found some fully assembled ones but I couldn't find and receivers to build up.