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  • Remington Series Mag Extention - MKII
  • Remington Series Mag Extention - MKII
  • REMINGTON- 870-1187 PLUS2-KIT-2
  • Remington 870 Series Magazine Extension
  • Remington 870 Series Magazine Extension
  • Remington 870 Series Magazine Extension

    • Remington 870 Series Magazine Extension

    S&J Hardware

    (9 reviews) Write a Review
    SKU:
    REM-870
    Width:
    8.00 (cm)
    Height:
    8.00 (cm)
    Depth:
    8.00 (cm)
    License Required:
    Non-Restricted

    Product Description

    **TO AVOID SHIPPING DELAYS, PLEASE INPUT YOUR PAL NUMBER, DATE OF BIRTH, AND EXPIRY DATE IN THE INFORMATION FORM WHEN PURCHASING ONLINE.**

    Fits: Remington 870, 1100, 11-87, & Versamax.

    CNC machined from 4140 steel.

    Finished product will be Cerakoted in Graphite Black

    Comes with:

    • 3 Position Sling Plate
    • C Clip (to install sling plate)
    • 1 Million Cycle Magazine Tube Spring
    • No Jam Follower - Type 3

    Overall length:

    • +1 - 2.25 inches - Will not work as a bayonet mountable solution. 
    • +2 - 6.75 inches - Will not work as a bayonet mountable solution. 
    • +3 - 8.75 inches

    Made in Canada.

    Compatibility: *Likely not compatible with any clamp designed for use with a tube made of aluminum, or having a plastic sleeve covering. These tubes tend to be a little thicker in diameter.

    Product Videos

    Custom Field

    License Required Non-Restricted

    Product Reviews

    Write a Review

    9 Reviews Hide Reviews Show Reviews

    • 5
      870 2 round extension

      Posted by Unknown on 14th Sep 2025

      As advertised. Well machined. Complete kit.

    • 5
      Remington 870 Series Magazine Extension - MKII

      Posted by Loic on 30th May 2025

      Perfect! Nothing to complain! sj hardware tiers 1 canadian brand

    • 5
      Magazine Extension

      Posted by Konrad Lau on 28th Mar 2025

      I origininally had installed a Wilson Combat extension on my Remington 870. Then, I decided I wanted to install an M-9 bayonette. Upon receiving the knife, I found the guard ring would not fit over my original extension. That to searching out S&J Hardware. I ordered the new extension, received it and found my attachment lug dimension would not allow installation. Therefore, I ordered S&W mounting lug. So far, mounting that $50 knife has cost over $250! Getting smarter is not always cheap... S&J has been the only solution to my problem. Thank you!

    • 4
      Shotgun Extension

      Posted by Andrew on 27th Dec 2024

      Very high quality shotgun mag extension

    • 5
      Best mag tube extension you can get

      Posted by Justin Ross on 5th Apr 2024

      Of all the mag tube extensions available, this is the only one I found that is flush with the end of an 18.5” barrel (+2 shot). On top of the the quality and finish are top notch.

    • 5
      Everything fits very nicely

      Posted by Danny on 1st Mar 2024

      Wish I would have gotten it sooner

    • 5
      Great buy

      Posted by Tad Rutkevich on 2nd Oct 2023

      Excellent build quality, and makes the shotgun look that much better!

    • 5
      Great

      Posted by Eliot on 23rd Mar 2023

      Great

    • 4
      Extended

      Posted by Martin on 16th Dec 2022

      Fit perfect. Still waiting on a detenter to remove the dimples but everything looks to fit great.