Agree with Dave, no way you're going to find a FF that goes over that GB setup. I'd get a nice drop in quadrail or even a basic handguard upgrade like a Magpul SL and then just use a fixed front iron site like a DD, Troy, LMT, etc.I have one setup with a YHM rail to the gas block and a BNIB one that I was thinking about putting a full handguard on it but might sell it to get a bolt action.
NKD I will have to look again but from the picture below the gas block looks a little different.
Next question, if I decide to keep the new one and want an A2 stock on it, what internal parts would need to be changed? Below is a picture of the gun.
View attachment 77873