Using off-the-shelf parts, the group TheSentryProject.com have built an Airsoft “minigun” sentry to fulfill their Portal fanboyism:

Video of the project below. Looks like some works needed on acquisition speed, but this is a pretty good platform to work on!










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“It fires 6 mm custom crosman rounds at 10 rounds a second. It cost over 10 dollars to fire this weapon… for 12 seconds.”
wow. the entire construction is brilliant. where did u get the idea from? I would love to know the details as to how you made it. once again a fantastic job