Ambidextrous、 quick-detach sling swivel can be mounted on either side of the mounting plate on adjustable M4-type buttstocks so you can position your sling for optimum comfort and versatility. Hard coat anodized、 6061 aluminum body with a matte black finish holds up to the toughest use and won¡¯t crack or break over years of shooting. Won¡¯t interfere with the operation of stock and works well with single-point、 two-point、 or three-point tactical slings.For 4-position or 6-position Carbine stock. Note: Will not fit side foldin units.