Here's a few things I've learned putting a Magpul AFG on my SGM foreend on my Saiga 7.62x39.
-As Greg stated, there is no sling loop on the SGM foreend. Furthermore, if you're going to put one of the Magpul AFG grips on it, it's going to occupy pretty much all of the lower rail space, so any rail sling attachment is going to have to go on the side.
-Get the AFG V2 (the smaller one). There's not a lot of rail space on the front, and the AFG I puts it really far forward. I used a Dremel and made two diagonal cuts on the top of the rail interface of the AFG II to allow it to sit even furt