The BLK LBL Bipod's innovative barrel-through design allows the rifle to sit 'in' the bipod, rather than 'on' it, with the center of rotation of the bipod effectively centered on the bore, making it inherently more stable. The result is a balanced rifle without the top-heavy tendencies that can come from large optics. The ball and socket joint provide fluid movement for improved target acquisition and accuracy. With 40 degrees of pan and 15 degrees of cant in each direction, adjusting leg length to level your scope is a thing of the past. BLK LBL was borne out of the question: Why is something as practical as a bipod still an impractical attachment? Mfg: Blk Lbl Corporation