I have an Evolve X-94 bolt kit for sale.
I have o-rings for it, except for the 2 square ones. I still have the square o-rings, but they are pretty old, since this has been sitting for a long time. Regular o-rings can be used in its place, in a pinch. (picture shows it without o-rings, but it does come with them on)
It does have a custom, CNC'd raw aluminum backcap, so the owner can paint/anno it to match their marker.
I dont have a DM4 anymore, so I am unable to test it again, but it did work before.
Asking $90 shipped, obo.