Caldwell XLA Pivot Bipod, Attaches to Sling Swivel, Aluminum, 9-13, Black 571429 The Caldwell XLA Bipods provide a stable shooting support that conveniently attaches to almost any firearm with a sling swivel stud. XLA bipods solidly clamp to the swivel stud of the firearm and remain firmly in place. The lightweight aluminum design adds minimal weight and deploys quickly" with legs that instantly spring out to the shooting position with the touch of a button. Soft rubber feet provide enhanced stability" while the padded bipod base protects the firearm's forend.