These HFC BBs are paint-filled plastic shells, and function just like a sized-down version of a regular paintball. Not a great idea to use these in AEGs or GBBs because in the case of rough loading or a jam, one could explode inside of the gun and cause all sorts of messy problems. I do not condone the use of these for that reason.
Problems with them aside, they are pretty neat and are a cool way to do something different with an airsoft gun.
The gun used in this video is a WE Hi-capa 5.2 “Striker”.
Thanks for watching!
Link to where I purchased these: (I know someone will ask)