All products of the following link are 50% off with code "Y8EOMTJK",Place order via this link https://www.amazon.com/promocode/AI3MZ25D9AK58?maas=maas_adg_D291CE4BB8E7B4A16555BA53FBD953DA_afap_abs&ref_=aa_maas&tag=maas [PACKAGE INCLUDED]1 x 6-9” bipod, 1 x sling and 1 x sling stud bipod adapter for 20mm rail [S LOCK RATCHET LEVER PIVOT]Design for all the "S" Series (swivel) bipods, replaces the tension adjusting knob for an easier and firmer level control [ADJUSTABLE BIPOD LEG] Return spring adjustable leg of bipod, 5 settings, 6” – 9”, you could adjust the length to meet different needs