WagMag MKII (Nerf 54 darts clip)

How to make a 54 darts nerf clip/magazine.

The history of this idea:
https://www.reddit.com/r/Nerf/comments/3towfh/the_wmag_a_simple_triple_18round_magazine_design/
https://www.reddit.com/r/Nerf/comments/3tsdjk/wmag_brackets_prototype_mk1_inspired_by_seajaycjs/
https://www.reddit.com/r/Nerf/comments/3tvc8q/wagmag_mkii_ready_for_battle/

Still a work in progress, try it and them me how it went!

UPDATE: Haven't got time lately to work on this, so i'm uploading the SLDPRT if anyone wants