OK, so now we forget about the superdartgun and start thinking about the gadget.

Remember that it should be able to be used by the group as well as by James if/when he comes back.

Grappling hook is a good idea - any more features we can pack into it, though?

"Hey, Blorrs, yew got a meydeek with yew? Oy don't feel loyk keeling moyself."

Maybe the grappling hook can explode with the push of a button, and has spare hooks?

So, uh, no player character is capable of medical action? Damn...

Perhaps the gadget can be some form of super multitool that breaks all electronic devices, or some other electronic device for doing such purposes.

Because that will be extremely useful when we're heading ever deeper into the jungle.

Yeah, I'm thinking we should view James' abilities and see what his weaknesses are.

Well, it should use both hands.

James Blond

Abilities:
Ambidextrous (+1 to rolls involving the use of both hands)
Sly (+1 to sneaking, deceiving, picking up ladies etc)
Mental Link - Vladimir ('Telepathy' with Vladimir)

Weapons:
Super-Heated-Plasma-Rounds Rifle (92% Energy, Slung)
High-Powered Dual Laser Pistols (80% | 80% Energies, Holstered)
Mono-filament Bladed Bronze Knuckles (Worn)

Inventory:
Backpack (22 slots used, 3 available)
-Rations (15 meals, +1 to next action, 3 slots)
-Water Bottle (2 uses, +1 to next action, 1 slot)
-Two hand-lit flares (2 slots)
-Box of 12 Cigars (lasts 2 turns, +1 to awesomeness, 1 slot)
-Box of 50 matches (3+ to use, 1 slot)
-1x C-4 Explosive (3+ to use, 2 slots)
-3x Flash bangs (3+ to use, 2 slots)
-Blasting caps (3+ to use, 1 slot)
-Box of 6 Cigar guns (Disposable, single use, 1 slot)
-Fancy Expensive, manly cologne (1 slot)
-Plasma Rifle Ammo (5 mags, 5 slots)
-Utility machete (2 slots)

Wristblades for both hands, not very origional but useful.

He has mono filament knuckles that can cut through anything - wrist blades wouldn't be particularly helpful.

Grappling hook it is.

Forgot about those, and since I have no voting power I say... A shoopdawhoop cannon.