By A Mystery Man Writer
Grapple Gun - The Dark Knight Rises Guide - IGN
Did Batman's grappling gun predate the Tim Burton Batman film? - Quora
Would Batman's grapple gun work in real life? - Quora
Grapple Gun (The Batman film), Batman Wiki
Cyborg's Dad Built Batman's Grappling Gun? Detective Comics #998 (Spoilers)
Can Batman's comic book or movie grappling gun be possible in real life? - Quora
Batman Reveals the Origin of His Grapple Gun (& Its Connection to
Grapple Gun, Batman Wiki
In which comic does Batman use a gun? - Quora
Grapple Gun, Batman Wiki
Grappling Hook Gun, Watchmen Wiki