Unlike Other abandoned military project, XM8 is cancelled for no real reason.
Honestly, most people look at the thing and go "Oooh curvy and spacey looking, and it's not an M16. It must be the BEST GUN EVARRR!" It is simply
not. It's not in the toilet because of "CIA disinfo murderdeathkill false flag wiretapping propaganda Illuminati NSA secret elite special forces spy
conspiracy," or whatever nonsensical string of random words you just came up with. It's in the toilet because it was a poor option.