shooting stick

Short definition from Wiktionary

Noun

1. 1
   A walking stick that has a spike at one end, and a handle that unfolds into a simple seat; used as a short-term seat at outdoor events.
2. 2
   A portable weapon mount used by field shooters, like hunters, snipers and metallic silhouette black-powder rifle shooters, similar to a monopod, bipod or tripod, with one, two or three legs.
3. 3
   A printer's tool to be struck with a mallet for driving quoins.