Ok so I have a pistol/future sbr with 10.5 carbine gas barrel, right now I have a 10 inch free float handguard with lo-pro gas block but was actually thinking of changing to a a2 style front block. There is one from palmetto that uses set screws instead of the horizontal pins like the OG A2, has anyone had any negative experience with these im sure its not quite as tough as the older version but I don't want to try or pay to have the pin area drilled out to have an older style