S&J Hardware Mossberg 590 +1 Magazine Extension - North Tactical Supply Co.

S&J Hardware Mossberg 590 +1 Magazine Extension

Regular price $55.00 Sale

S&J Hardware Mossberg 590 +1 Magazine Extensions are extensively field tested and meet or exceed law enforcement and military requirements.

This extremely durable, high quality, solid steel Mossberg 590 Magazine Extension comes with everything you need to upgrade your shotgun to the next level.

S&J Hardware Magazine Extensions are CNC milled from pure steel, Just like your gun.  Don't settle for aluminum.


  • Removable 3 Position Front Sling Plate
  • Super Duty Magazine Spring.
  • No Jam Mag Follower.


  • Fits Mossberg 590, 590A1, 590 Shockwave,535,835,935
  • CNC Milled From Solid Steel
  • Finish:
    • Controlled Gas Nitride, Mil-Spec Black Oxy Finish
  • Total Length:
    • 2 1/4" (+1)
  • Made in Canada

      Questions & Answers

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      • Does the total length 2.25” include the threads? Ie if I have a mossberg 590 20” barrel will this stick out pass 1”?

        The total length of the 590 +1 Magazine Extension is from the very top of the unit to the very bottom of the unit.  I believe this may stick out a bit.