These sci-fi* weapons were designed from scratch for the Lucky 13 jointed figure by soozafone, though they may work with other action figures.
They are borne of my own imagination, however they were clearly inspired by science fiction movies and games of my youth.
*Technically a buoy knife isn't science fiction, but who's counting?
I highly recommend using PETG for this, as PLA is likely going to be too brittle (though please share if you find otherwise!).
The attached 3mf file is plated exactly as I have printed it (.4mm nozzle and 0.15 mm QUALITY default settings for Prusament PETG).
I found no supports or brim were required.
Assembly is pretty straight-forward using the following image as a guide:
The author remixed this model.