As posted at Halo Waypoint by Bs Angel on August 8, 2012:
Before you learn more about the UNSC weapons available in Halo 4, we thought you’d like to see them in action. So, check out the following video, and then continue reading to find out the specifics about what you’ll soon have at your disposal. (By the way, the music in this video is not from the original soundtrack. We’ll tell you more about where it is from on a later date.)
If you’d like to hear the UNSC weapon sound effects in all of their not wub-wub-wub glory, here is the same video without the music. And yes, we will be doing the same thing with Covenant and Promethean weapons soon-ish, and we may even show them off on a different level.