Kylo Ren’s Command Shuttle is an Upsilon-class shuttle reserved for the First Order’s elite. The upper wings’ sensor arrays retract in landing mode and are encased in thick armor, while the lower stabilizers transform into landing gear. Weapons are simply two dual laser cannons and two proton torpedo launchers, it’s rumored that this ship also has a built in tractor beam, though its never been used on screen.
The Lego model features extendable wings, hidden spring-loaded shooters, opening canopy, opening rear hold, and lowering ramp. I forgot to take a picture of the ramp, but you can see it (retracted) in image 4. It’s the black piece with steps on it behind Kylo’s head.
Update: a picture of the ramp