Two-piece clamp with single cross-bolt secures adapter to Picatinny/Weaver-style handguard rails so you have a front sling attachment point. MCTAR-06 has pivoting, 1¼" wide swivel for direct sling attachment. Rubber coating on swivel prevents noisy, metal-to-metal contact. MCTAR-07 includes a fixed, dome-shaped stud that accepts your own, standard quick-detach swivel. MCTAR-08 includes a 11⁄4" wide, 360º rotating, push-button swivel for rapid sling removal. MCTAR-08HD has heavy duty base and swivel that stands up to extreme tactical operations. 1¼" wide, quick-detach swivel limits travel to prevent sling wrapping yet allows necessary movement.