Atlas Bipods PSR Tall Atlas Bipod-No Clamp-for BT19 ADM 170-S ARMS 17S TRAMP LT171 Black BT47-NC. The also mounts directly to our AAIS Part # BT19 and Sako TRG mount.Height Range approximately 7.0 - 13.0".15 degrees +/- of preloaded Pan.15 degrees +/-...