If anyone is wanting to know how to mate the larger hole DPMS upper with the small hole AR lower take down pins on the POF receiver, the solution looks like it can be solved with a couple of "Colt Receiver Adapter Offset Bushing". For the younger guys Colt AR-15s use to have two different size pivot pins.
If you look how the upper mates with the lower you can see that the holes appear slightly offset.
I found some online for $3.50 a piece which is pretty cheap. When I get hem in I will let everyone know how well they work. Hopefully, this will help the guys who bought stripped POF lowers.