O.K. .... seen many pics of the two. Is this something the a machinist could overcome? Not sure, but where there is a will there is a way. Maybe not though, perhaps it is just too far out there.
Could a piece not be "created" so they will mate together? And does an AR with the 22 conversion kit still use the buffer and spring or is that action taken care of in the pieces of the kit? Just curious.
Your not getting it, a good machinist could make anything work. If you have the tech/materials and machinery to "join" these two parts together then you could just make your own gun and it would be alot less work than making a Swiss lower/AR upper abortion.




















































