Brass Monkey 2
Designed by Steve Nicholls and Ali Morris, purchases 2019.
(7 brass cylinders, where two go together to make a total of 6 cylinders, each 2.75" long)
A combination of a trick take-apart puzzle and a 6-piece burr.
Looks like a 6-piece burr when assembled,
but it is actually 7 pieces where half of the key piece unscrews
(not a burr move).
The other half of the key piece is held in by a pin so it
does not fall out and is not the first piece to be removed
(not a standard burr feature).
Here are photos of the puzzle being assembled: