I'm looking to swap AR barrels and install a 300 BLK barrel.

I'm looking for a gunsmith or preferably someone knowledgeable that can actually show me how to do it (would compensate them).

Other than swapping stocks, grips, hand guards and install lower parts, I don't have the experience to do this and but really want to learn how to.

Looking for someone in NE Philadelphia or surrounding burbs.

Thanks in advance.