This is a Magpul Industries Stock known as the SGA, model MAG490-BLK.
The SGA Stock is an ambidextrous" user-configurable buttstock designed to add much-needed adjustability to the tried and true Mossberg 500/590/590A1 12ga series of shotguns. Featuring a spacer system for length of pull adjustment" improved grip ergonomics" recoil-reducing butt-pad" optional cheek risers for use with optics/raised sights" and other accessories" the Mossberg SGA brings Magpul design and engineering to another classic American firearm. Available in Black" Flat Dark Earth" and Orange to adapt to the mission at hand. Made in U.S.A.
Features:
Spacer system for length of pull adjustment
Fits Mossberg 500/590/590A1 12ga series of shotguns
Improved grip ergonomics
Ambidextrous
