Weapons as real as it gets

We all know about the fantastic weapons in comics from Thor's hammer to the lantern ring. But which of these paraphernalia would you like to have in the real world since they could exist. Each item is designed exactly as in comics meaning shield for example is 100% admantium, etc.

Cap's shield
http://marveltoynews.com/wp-content/uploads/2016/02/Marvel-Legends-Captain-America-Shield-Life-Size-Hasbro.jpg

Batman's grappling gun or
https://cdn.instructables.com/F1E/NQHT/ISCAWYR9/F1ENQHTISCAWYR9.LARGE.jpg

Star lord's rocket boots:
https://becomingstarlord.files.wordpress.com/2015/08/starlord-boots-3.jpg

Cap’s shield; i wouldnt be able to actually use it, but i’d hang it on my wall.

-The grapnel gun would be cool, but i’m too old to be swinging from rooftops.
-the boots would be amazing, and if it werent for Cap’s shield i would have picked them.

I would likewise hang caps shield on my wall and definitely take it playing paintball which I've never done. But im really tempted to take star lord's boots. I still can't decide honestly.

Each object has a good ‘wow’ or just plain ‘fun’ factor to it.
Tough choices!