Each image links to a larger version.
The original picture was submitted on July 4, 2003 - the two followup pictures came in on July 11. Yes, this is the same guy who posts at the Xbox.com Halo forums, for those checking.
The rifle is a working pellet gun made of solid wood, with a laser sight scope. It's set to the same scale as the Halo original. If you like this work, check out some of Chris' renders in our Miscellaneous Art section.