This may be a bit of a tough one. Several years ago I had purchased a few Remington Defense handguards from Brownells. They have a non index style barrel but that is steel, and tightened with a pin spanner wrench.
Anyways I was going to planning to run a picatinny mount bipod on it, but I cannot for the life of me find where or what type of rail sections to get for this. The rail is NOT MLOK, and it looks like it would just take a flat section of picatinny rail screwed to it. It was suggested in another forum that it uses similar rail sections as utilized by a HK 416 rail, IE a Cadex modular rail section, but I got one of these and this decidedly does NOT fit.
The screw holes have an approximate 2" CTC spacing. I have seen some other rail sections that I think could be adapted, which appear to normally be used for attaching a bipod to a conventional stock, but I am still not sure.
Any help from the collective Hide mind would be very helpful.