The OPSMP Push Button Sling Swivel Mount for the M16 rifle is made using tough aluminum with a matte black finish. The sling mount essentially slides into place over the tube, without the hassle of disassembling the tubing. Suitable for left or right-handed users, the OPSMP Push Button Sling Swivel Mount accommodates one-point slings, but requires the addition of the actual Push Button Sling Swivel (#PBSS, sold separately.) The Push Button Sling Swivel Mount is perfect for adjusting the weapon while using a single point sling. Features Include: Ambidextrous design with a quick release button, Great for rifle to pistol transition - ideal for weapon balance, Easy and fast installation - no disassembly required, Made of high density Aluminum. Sell Unit Each.