"Past 531123 AR Prone Bipod Black Easily attachable and detachable from the front swivel stud. Folds forwardwhen not in use. Underside of bipods have a swivel stud so rifle can stillbe used with a sling. Prone weighs only 10-1/2 oz., lighter than mostcompeting models. Aluminum and glass-filled polymers makes bipods virtuallyweatherproof and rustproof. Features 18 degrees of available cant (tilt) ineither direction and rotates left or right 20 degrees, withoutrepositioning bipod legs. Adjusts from 8-3/4"" to 12""."