Deviant Artist, Batman-Bananas created a super amazing custom steampunk Aperture Science Portal Gun.
We’ve got no idea how he did it, but check out the list of parts he used and then marvel at the picture below.

Portal Gun created from:
2 antique clock movements
1 +1/2 hangers
Metal teapot stand
plastic mechano
plumbing parts
1 plant pot
1 hair gel pot + various lids
plastic tub (those ones you get nuts in the the supermarket)
plastic tubing,
lots and lots of nuts and bolts,
miniature storage box (for the battery compartment),
pocket laser disc (you can get them on ebay if anyone’s interested),
3 lightbulbs,
carboard tube, metal covering from an old hairbrush,
AV socket,
tons of odds and ends from [his] parents garage,
oh and of course the usuals – milliput,
humbrol and warhammer paints,
hot melt glue
about 6 gallons of superglue.

Source: jpegy