Scott and their proprietary shocks. Doesn't look like you could even get rid of it for a piggy back shock if you wanted to - trunion metric mount so you couldn't flip it around and no room for the reservoir in stock config.https://www.pinkbike.com/news/scott-launches-new-170mm-travel-ransom-enduro-bike.html
Interesting looking bike.
But at first glance, that twinlock crap...well sounds like crap. And no drainage hole at the lower shock mount? Looks like a nice cup for water and mud to sit in.