Atlas Bipods Leveraged Rail Black. The will provide the means to add the quick release feature provided by the ADM lever to any rail attached accessory to include our BT10 Atlas bipod and PRM monopods. When attached the measures .58" from bottom of rail to the bottom of the BT20B rail the BT20B rail is 1.60 long. Weighs 2.5 ounces. Specifications for Atlas Bipods Leveraged Rail: Manufacturer: Atlas Bipods Color: Black Country of Origin: USA Package Contents: Atlas Bipods Leveraged Rail Atlas Bipods BT43 Leveraged Rail Black