Flash, along with Grunt, never got the proper treatment from Hasbro in regards to their comic pack figures. Grunt was an easy fix, basically just a head swap, but Flash was a little trickier. I decided to find a gun and backpack that more resembled the comic book version. After that (and finding a suitable head), the only thing left was to give him the comic pack color scheme, which really made him fit in well with the rest.
Thanks for looking!