Core 77 has a whole piece on 2012 Shot Show which features a lot of zombie related weaponry. Even a Zombie gun cleaning system, an apocalypse would be nothing without it. Click pic to read the article!
The Integrated Grip Rail System combines a handguard and a modified funneled magwell grip. Grauer Systems touted it as a means of easier handling of the rifle and faster reloading, in spite the rather bulky appearance. However it doesn’t seem the IGRS ever made it into production for the public since its debut at the 2010 SHOT Show. You can read up on the supposed benefits in the link below. (GRH)