Some people might consider the Federal Ordnance stocks to be comparable to the OG folding stocks. I actually like how they fold under the rifle instead of to the side. I hear one of the drawbacks is that the stock can't be folded with a 30 round magazine attached. Doesn't matter much though because in my opinion both the stock and a 30 round mag are pretty unnecessary. It does look pretty awesome though.
Regardless of the stock, you should make sure it has the stock reinforcement and forend liner. They can be purchased through midway if it doesn't have them. I'd go with the stainless over the blued.