Engineer builds 'Batman-quality' grappling gun in only one year

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Can anyone help me to build a grappling gun just like the one

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Always wanted a working Batman (1989) grapnel gun prop. So I

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Batman (Arkhamverse), Batman Wiki

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How is it that Batman's grapple gun doesn't dislocate his shoulder

Always wanted a working Batman (1989) grapnel gun prop. So I