Calico did make some fun stuff. That twin-barrel 10/22 gatling gun kit with tripod is a hoot to shoot, and cheap too. Using the Mitchell belt-fed 50rd magazines, you can empty 100 rounds in just under 6 seconds.
Their little hundred rounder pistol with the twist spring snap-on magazines are also fun -- and BOTH of these items were dirt cheap when they came out. I regret not getting their 9mm carbine when it was available.