Tripod
Also: Tripod Shooting
A three-legged support that stabilizes the rifle for standing or seated shots, usually clamping the rifle at an Arca interface on the forend.
A shooting tripod gives you a stable platform when the ground or the stage will not let you go prone. The rifle clamps into a head that grips an Arca rail on the forend, and the three independently adjustable legs let you build a steady position standing, kneeling, or seated. In practical precision matches the tripod is often the difference between a clean position and a wobbling miss on an elevated or awkward target.
Stability from a tripod comes from the same principle as a bipod: you load the support by leaning weight into it so the rifle settles rather than bounces. A rear bag under the buttstock or a hand squeezing it controls vertical movement, much the way loading the bipod controls a prone position. A tall, heavy tripod is steadier but slower to deploy, so match shooters trade weight against speed depending on the stage.