Great Hornet! I don't own Halo 3, so I can't speak for this one's accuracy, but it definitely looks better than many of the Lego Hornets out there. I especially like how you did the three-barreled Gatling guns, good work!
Wow... lots of technique packed into this MOC. The lift fans and the triple-clusters of those flick-fire elements look great. This is a nice change from the usual, poorly-made Halo MOCs that abound on MOCpages.