All UNSC tech is currently available with the exception of the Shaw-Fujikawa TLE. We also don't know how the UNSC ships propel themselves in RealSpace. Other than that, we've got everything else:
MAC gun: http://www.technologyreview.com/Infotech/20164/?nlid=857&a=f
This SOB can send a 7 pound slug at 7 times the speed of sound.
All UNSC weapons are completely feasable. The Cyclops and MJOLNIR armor are all possible (and we already have something like a Cyclops).
The Spartan Laser is truly possible, but an advance in power storage systems is necessary.
Christian, Conservative, Republican. In that Order. -Mike Pence, Indiana Congressman
Death to the WaffenSS!
www.Micom.net/oops = The funniest pictures I've seen in a WHILE!!