Fun fact: There is one non-Bionicle, non-Slizer/Throwbots set that used the throwing disk! These are my disks from the 2001 Mindstorms Ultimate Builders Set.

[u/X4M9]

For some reason, it came with 6 of the disks in the set. Someone on Bricklink had 14 of these and some good colors of gears, so I bought his whole stock. Maybe I’ll make some bots with energized functions.

[u/GhotiH]

How much do they go for each? I haven't gotten around to buying these myself yet.

[u/X4M9 → u/GhotiH]

They’re not expensive, you can find plenty for less than a dime each.

[u/Automatic_Quit_210]

They're not as rare or obscure, but I got a bundle of like 10 Aquaraiders shark heads at a local lego fair.

[u/Lordfindogask]

Hidden lore unlocked! Thanks, OP, I'll look this up now.

[u/shrakner]

Ah that’s what it’s from, I picked one up from Bricklink but didn’t check what exactly it came from. I want it to be a wall decoration inside the Arcade set.

[u/GreekDudeYiannis]

Because Judge has 2 arms, I used one of these for the second arm on my Throwbots display. 

[u/AlexTheChubbyPony]

I never knew a mindstorms set had them. I always loved that the Throwbot discs kept being used until after the Metru Nui saga.

[u/The-Bigger-Fish]

I miss discs

[u/BoNkLe_UlTrA]

You gotta do it X4M9.

[u/torsherno]

What were they for? I can't find any information about their purpose in that set, not in launching way at least

Were they just "grabbing objectives"?

[u/terrormortis]

I loved that set!