Keymod sling stud Mount-Bipod-Adapter for Harris style bipods mounts on 2 slots on your key mod handguard. Great for adding a sling swivel stud to your KeyMod hand guard. Sling stud can also be used for mounting bi-pods that use the sling stud mount, like the Harris and NcSTAR precision grade bipods. Black hard anodized aluminum construction. Length 2.4".