This method works well regardless of the size of the forearm. I used the rivet hole on the narrow forearm. You want the stud with the backing nut. Google is your friend and Uncle Mike does have them.Just order a sling swivel stud and drill a whole through the bottom of the handguard where it won't interfere with the barrel and install the stud. Then use a standard Harris style bipod that clips to sling swivel studs.