I have a few of the original ones in 9mm and I guess I got lucky as they all run and shoot great. I will say that the 2.0 has a better trigger right out of the box the mine. I am not sure what else they changed other than the longer slide rails on the 2.0

I may not be smart but I can lift heavy objects

I have a shotgun so I have no need for a 30-06.....