I saw a bunch of AAP01 prints that charge some sort of fee. I wanted to make something like this available for anyone who doesn't want to pay anything :)

This is the top rail mount that is compatible with:
My MK7 Handguard!
My Mk5X Compact Handguard!

KEEP IN MIND THE ORIENTATION MATTERS during installation. (Sloped side of the rail faces toward the back).

I suggest using the picatinny top rail with some extra hardware:
2x M3x12 screws.

I printed my rail upside-down without support as well as a brim. Use 3x walls and 30% infill. I cleaned everything up with a craft knife, especially the holes/chamfers for the countersunk screws.