I'm guessing the canisters would be quite small and gas-proppel the grappling hook.

Is there some form of structure needed for the grappling hook to work? Like a higher location or a certain type of material to hook onto or maybe even into?

Also, its up to you but i would like it very much if the hidden gun/knife launcher would be capable of attaching other special armors such as stealth suits and/or ghillie suits. This since it would fit nicely with stealthy characters.

Finally, why is it called a skeleton suit? Does it look like a skeleton or have an exoskeletal structure? Otherwise, I'd think a name such as "versatility suit"