By A Mystery Man Writer
This maker built a working Batman grappling gun in only a year
Bat-fan Builds Ultimate Real-life Batman Grappling Gun
Batman Super man Grappling Gun Toy DC Comics BRAND NEW
Real working Grappling Gun
The Hacksmith: Just Cause Grappling Hook Gun
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Grappling Hook Launcher : 15 Steps (with Pictures) - Instructables
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Grappling Gun- First Run by Bilious on DeviantArt