The Elftmann Tactical Ultralight Aluminum Stock is the lightest all metal adjustable stock produced today, weighing in at only 5.2 ounces. Innovative features include ease of adjustment over the entire length of the buffer tube and silent operation. No clicking into detent holes. A simple turn of the knob allows full adjustment and when tightened it is rock solid with absolutely no rattle. For complete and current information on this item please see the manufacturer's website.