I decided I wanted to free float my barrel. I have a carbine setup atm. To do that I would need a free float hand guard from Troy, DD, yhm ect. As for the gas block I would need a new gas block and a front sight that eather folds or is about to screw on to the gas block. I am not going to be able to have the gas block and front sight be one unit like it is now. Does this all sound correct? My friend has a DD rail that is bolted onto the receiver to free float it. Is installing this new rail going to be something I can do? thx.