Ok, got the MOE rails so I got my specs but that wasn't working with the gun shape so top and bottom rails are integrated in it.
The handguard is a a bit shorter than the regular hanguard, it's 267mm long (don't ask me length in inches you damn imperials !

).
Top rail is 8 spaces, bottom is 22. It's not Picatinny or Mil-1913, I used the STANAG 4694 specification. All equipment are still compatible, it's just the last version.
For the side rails it's using the fixation of the magpul MOE rails, I thought it for use with L3 and L4 sizes, only the front screw locks the position.
The holes under top and lower rail are supposed to be a small detail for venting.
Now to get that thing printed !
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Tous les jours nous nous endormons plus instruits mais pas forcément moins bêtes...
I can do a CTRL+ATL+DEL on your gun !
Gun doc in Montreal on AEG, GBB, GBBR and Bolt rifle (gaz and spring)
Heavy custom builder (including painting)