Quoted:
Im trying to decide what to put on my Franklin Armory Billet lower.

Regardless of which upper, Im planning an 18" fluted recon barrel from Wilson Combat with a Lancer System Long Carbon Fiber hand guard.
 Lets have plusses and minuses.

These are listed in the order Im leaning towards.

1.  ASA side charger

2.  Franklin Armory billet

3.  Right side reciprocating side charger, Mega, Lars or similar

4.  Billet non FA, with Brass deflector.

Id pretty much automatically go with ASA if it was $100 less.