It's awesome but...it doesn't strike me as "halo", unless it's intended to look like a Jiralhanae weapon or a Covenant Loyalist weapon...yeah, sorry for being a nerd...
Not a bad thing at all This just has that kind of space marine vibe and because HALO was a popular subject I think I added that to the title. It does look a bit like the guns in Avatar. They had an almost lime green color. Pretty cool looking
That looks real cool, how long did it take?