[Fly 9]

That's the thing, modification would require me actually threading my fore grip. The pieces included do fit over the barrel nut (I'm assuming the barrel nut is the bit that keeps the outer barrel attached to the receiver) but it leaves a huge, ugly gap between the receiver and fore grip. Not only that but the allen screws don't keep it from wobbling all over the place. Looking at it and fiddling with it for a few days now I can honestly say that without severe modifications there is no way that this will go onto my gun and I don't have the tools/shop to do these modifications.

I have made an order for a used SPR front end which has been on a gun so is proven to work so I'm keeping my fingers crossed. I'm going to try to use whatever I can off my old one and then see if I can use whatever's left over for something else.

As for the gas tube, I understand that they don't have any functionality other than pure aesthetics, just exploring possibilities.