Here is a copy of the main marketing material that Mossberg was passing out at SHOT Show for their new Flex system that allows you to rapidly reconfigure 500/590 series scatterguns into a variety of setups. Wonder if any after market companies will build to the Tool-Less Locking System standard.
Tags: Mossberg
Thank you for this article that help me to know history of Mossberg Model 500. I interested in this shotgun too.