Magpul® SGA® Stock for Mossberg® 500/590/590A1 12Ga Black


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SKU: MAG490BLK Categories: ,

The SGA Stock is an ambidextrous, user-configurable buttstock designed to add much-needed adjustability to the Mossberg 500 / 590 / 590A1 12-gauge shotgun. 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 SGA 870 brings Magpul design and engineering to another classic American firearm.

Made in the USA.


  • Spacer-Adjustable LOP in  1/2″ Increments from 12.5″ to 14.5″
  • Recoil Reducing Butt-Pad
  • Integral Right & Left 1.25″ Sling Loops


Compatiblity 12 Ga Mossberg 500/590/590A1
Butt-Pad Width (in) 1.5
Butt-Pad Height (in) 5.0
LOP Min (in) ~12.3
LOP Max (in) ~14.3
Weight w/ Two Spacers Installed (lbs) 1.5 (w/ two Spacers Installed)

Additional Information:


Manufacturers, importers, suppliers, and distributors may make changes to their products without fanfare. Such changes can lead to discrepancies between the advertised product and the actual product in inventory. While International Shooting Supplies Ltd. endeavors to correctly describe the actual product in inventory, we will not be responsible for unintentional inaccuracies in text and images of the advertised product.



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Please note: International Shooting Supplies does not ship to addresses outside Canada.