S&J Hardware Mossberg 590A1 +2 Magazine Extension

$65.00 USD $75.00 USD

The S&J Hardware Mossberg 590 +2 Magazine Extension is a durable, high quality, Canadian made magazine extension designed to add an additional two rounds to your Mossberg 590A1 12 Gauge Shotgun.

Engineered for combat and law enforcement use, the magazine length has been made to fit flush with the 18.5" Mossberg 590A1 Shotgun.


  • Removable 3 Position Front Sling Plate
  • Super Duty Magazine Spring.
  • "No Jam" Mag Follower.
  • Bayonet Mounting End Cap.


  • CNC Milled From Solid Steel.
  • Controlled Gas Nitride, Mil-Spec Black Oxy Finish / Electroless Nickle Finish.
  • Fits Mossberg 590/835/935.
  • Length: 6.75".
  • Made in Canada.