Out of stock
SKU: LCRLSX2XM
UPC: 738435616618
MPN: LSX2XM
The Lancer Systems Lsx extension tube adds two rounds of 12-gauge capacity to the Mossberg 590 without the swing weight that comes with steel and aluminum extensions. Built from a carbon fiber tube with machined aluminum components, the whole assembly weighs just 2.4 ounces, which keeps the muzzle balance close to factory. It's a straightforward pickup for anyone running a 590 for home defense, three-gun, or hunting who wants more shells on board without changing how the gun handles. The extension installs in place of the factory magazine cap, so the upgrade is reversible if you ever want to return to the original configuration.
This Mossberg 590 tube extension measures 6.4 inches overall, including the extension nut, and is built to feed 2-3/4-inch shells smoothly. The carbon fiber tube cuts considerable weight compared to traditional metal extensions while keeping the bore diameter consistent for reliable follower travel. Lancer includes an extra-long magazine spring that you trim to the length your setup needs, and the assembly is capped with a machined aluminum magazine cap. For tubes that extend past the barrel, Lancer offers clamps to tie the two together for stability under recoil. Installation calls for removing the factory end cap and trimming the magazine spring. The same Lsx design also fits the Mossberg 930, so the carbon fiber approach carries across both platforms.
A 590 set up for defense or competition benefits from every extra shell, and the carbon fiber build means you get the added capacity without nose-heavy handling on fast transitions. Pair this extension with a fresh set of 12-gauge snap caps for dry-fire practice and function checks after install, and keep a shotgun scabbard on hand for transport. Browse our full lineup of shooting accessories for slings, cleaning gear, and storage to round out your 590 build. As a Florida FFL, we handle the paperwork on firearms while parts like this ship direct to your door.
This Lancer extension adds two rounds to the existing magazine tube capacity, marked +2 in the product name and MPN LSX2XM. It installs in place of the factory magazine cap to extend the tube without altering the receiver or barrel.
The carbon fiber tube with machined aluminum components weighs just 2.4 ounces, considerably less than traditional metal extensions. That keeps the swing weight near factory, so the shotgun stays balanced for fast transitions during competition or defensive use.
You remove the factory magazine end cap and install the extension in its place. Lancer includes an extra-long spring that you trim to the length your setup needs. The process is reversible, so you can return the gun to its original configuration if needed.
Per Lancer specifications, the same Lsx carbon fiber tube design is rated for both the Mossberg 590 and the Mossberg 930 in 12-gauge, feeding standard 2-3/4-inch shells.
If the extension tube runs past the end of your barrel, Lancer offers clamps to tie the tube and barrel together for added stability under recoil. Whether you need one depends on your barrel length and how far the tube extends.
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