Hello. I was wondering if there is anyone out there that has any experience with this forearm. I purchased this for my heavy barrel top end. It fits and looks awesome but i'm having issues mounting my bipod to it. It is not a keymod or Mlock so the only option i know of for rails is to buy their polymer rails. What i really want is to mount a sling swivel to it using the threaded holes the forearm already has along the sides and bottom. What i can't figure out is what thread the holes are. I've emailed Diamondhead but have had no response. My only other option is to take it back off and bring it to a local hardware store so i thought i would ask if anyone had one of these and knows what the threading on the holes is.

Contact Stag Arms. They sell lots of them and I'm sure they'll help you out.