Sentry robot from Portal

I made this as a gift for a friend who was really into Portal. I spent some time over winter holiday putting together the CAD by eye from various images, and when I came back to school I took advantage of the fact that our student machine shop has a 3D printer available for student use to make a few.

SLDPRT file is from Solidworks 2010.

Sentry robot belongs to Valve, I am just borrowing its image for a cool project.