The Flipstick: I used one of these for years before my neurosurgery back operation – recommended, as I had absolute agony staying on my feet without a break for any period of time.
They would also be useful if you were sitting up waiting for a trophy stag – or a man-eater, as Jim Corbett used to do I particularly enjoyed his Man Eaters of Kumaon and The Man Eating Leopard of of Rudraprayag which you can download here: https://archive.org/details/TheMan-eatingLeopardOfRudraprayag1947. If you enjoyed these two you will love Col Patterson’s Man Eaters of Tsavo)
It is decribed thus: ‘A dual purpose walking stick/seat, constructed from 4 interlocking aluminium tubes and strong polyester stock cord (this product practically assembles iself in front of you when released from its bag), non-slip rubber foot suitable for indoor and outdoor use, with comfortable plastic seat/handle. A spring-loaded button securely locks the seat/handle in either the walking or siting position. As a seat, it transforms a person into a very stable tripod.Lightweight to carry and yet capable of safely supporting 130kgs(280)lbs. This product comes with a comfortable, stylish, non-bulky, adjustable shoulder bag for ease of carriage. Height (seat up) 82.6cm. Weight 0.58kg.
Supplied with easy to carry shoulder bag
Lightweight and easily transportable
Easy to operate
Designed to securely support 130Kgs
Exchangeable Rubber feet
Manufactured from tough and durable aluminium & high quality plastic moulded seat
Suitable for left and right-handed users https://www.flipstick.co.uk/Flipstick_Foldaway_Short–product–21.html
Sitpack Zen: Here is another option, a little lighter 360 grams), more compact and perhaps more comfortable, but not so much use as a walking stick perhaps: https://www.indiegogo.com/projects/sitpack-zen-x-the-worlds-most-compact-chair-design-travel#/ and https://www.kickstarter.com/projects/rest/sitpack-zen-the-worlds-most-compact-chair-perfect?ref=FundedToday&utm_medium=referral&utm_source=33dsa.fnd.to
It is certainly a very clever, ultralight and compact design for a shooting stick. It should give you years of service bird-watching, glassing, at the footy, etc.