Metall sling hook. It can be easy to mounted (and press again to release) into the holes in the accessories for this purpose. Typical example is stock or handguard Magpul.
is among the oldest, most experienced and the largest Airsoft manufacturing facility in the world. Known for their unmatched quality control and professionalism, CYMA is selected to be the OEM of a vast amount of Airsoft products. Durability and performance meets affordability!