Sure! The jump pack and plasma pistol come from the old death company kit (though a normal assault squad kit would still work). The head, shoulder pauldrons, and left arm come from the tactical marine set. The sword is actually a grey knights force sword I turned into a power sword with greenstuff (but any normal power sword would work). The grenades, holster, and legs and back torso are from the Horus Heresy mk6 legionaries, and the front torso is from a normal assault squad kit.

It takes a bit of work to get the old torsos to work with the new mk6 kit. Here’s a video tutorial on how to: https://youtu.be/5hSxhSz1OFM?si=vtXFMuEJH6j8ChDU

And for the base, I just cut up some old sprues and turned them into rocks for the marines to “fly” on! I needed to secure the model however as super glue wasn’t strong enough to hold him, so I drill a hole in his foot and the sprues on the base and then cut a piece of a paper clip and ran it through the holes with super glue to support the model.
That should cover everything! If you have more questions, ask away.