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Remington 870 Magazine +2 Extension Kit

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Increase the capacity of your standard Remington 870 shotgun with our DIY +2 kit. XS Sights extension kit is built to be easily installable, lightweight, and offer additional tactical upgrades to your taste. There are two kit options; the first kit includes our detent tool to quickly hammer out the factory detents, 45" Wolff 12 ga extended spring, and the plus two extension tube. The second includes the 45" Wolff 12 ga extended spring and the plus two extension tube.

The one-piece design is machined from 6061 aluminum and hard coat anodized. The aluminum reduces the weight compared to traditional steel tubes. The tip of the extension has wrench flats to allow users to tighten the tube securely. Measuring 6 inches, the extension will not extend past the barrel on a traditional four round capacity shotgun tube.

The tube is machined to accept standard barrel clamps to allow for more support and provide the option of a sling attachment point. While built to work with the factory follower, aftermarket upgrades also work. Tested brands of clams and followers include Vang Comp, Nordic Components, and Wilson Combat. 

View Written Installation Instructions.

View article and install by ShootOn


WARNING-Cancer and Reproductive Harm –

All XS Sights products are protected by our No Questions Asked Warranty. We will replace the product if it becomes damaged in any way or if the tritium stops glowing prior to 10 years. 30-Day Satisfaction Guarantee: Try a new set of night sights risk free for 30 days. If you are dissatisfied with your purchase you can 1. Exchange the sights for a different available option 2. Return the product to the point of purchase for a refund. Sights that have been installed and test fired qualify for this program. Products must be purchased through XSSIGHTS.COM or a participating dealer partner. All dissatisfied products must be returned. Sight installation fees incurred are not subject for refund. Return shipping is payed by the customer. For assistance email or call (888) 744-4880.

2 Reviews

  • 4
    mag extension

    Posted by andrew schreiber on Mar 31st 2022

    needs barrel clamp & sling stud to fill end hole

  • 4
    Nice all in one package that works

    Posted by Brian B on Oct 25th 2021

    The package came quickly and arrived in perfect shape. The effort needed to really get the detents knocked out took a bit more work and dremeling than I expected. In the end it didn’t add much weight to the shotgun and it functions great so far.