Not a cheek pistol, but one of the neater 3D Printed PDW's, essentially a printable Flux raider brace for the 17L.

https://www.reddit.com/r/GlockMod/comments/qsisyu/presented_with_apologies_collapsing_brace_gen_3/

And 17L slides are currently on sale....

https://zaffiriprecision.com/product/rts-g17l-long-gen-3-zps-3-rmr/

Oh man, that's pretty darn neat!

Not sure if you've seen this, but this subreddit is nothing but 3D printed gats, and could be a good resource for your project / inspo for other cool builds:

https://www.reddit.com/r/fosscad/

Yeah I'm very familiar with fosscad deterrence dispensed, the gatalog, weapons guild, weaponeer, and other places as well as following Ivan's keybase. I need to look into Kadecad's stuff more though since he has a 3d printed AR that's still straight pull for now where the only metal is bolt bbl and extension. Looks like even his carrier is printed.

His latest iteration may even hold up to full power 450 bushmaster

The printer is coming along, this is just the last assembly picture I took not how far it's currently assembled. I'm substantially further along than this, but these two give a good idea of it's size and girth.

Definitely going to need a bench and maybe some racks.