Mossberg 12 Gauge 20″ All-Purpose Shotgun Barrel

The Mossberg 12 Gauge 20-inch All-Purpose Barrel (Mossberg part number 90140) is a direct factory replacement barrel built for 12 gauge Mossberg 500 and Maverick 88 six-shot models. It pairs a vented rib and dual bead sights with a smoothbore, blued-finish tube, and it ships complete with an Accu-Choke set covering Improved Cylinder, Modified, and Full constrictions plus the wrench needed to swap them. That range of chokes makes it a genuinely all-purpose barrel, equally at home on turkey, waterfowl, or clays. It is not compatible with the 500 Cruiser or 500 Chainsaw variants, so shooters running those models should look elsewhere.

Key Specifications

• Barrel length is 20 inches, a fast-handling length suited to field and defensive use alike.
• Chambered for 12 gauge shells, matching the Mossberg 500 and Maverick 88 platforms it is built for.
• A vented rib runs the length of the barrel to reduce heat mirage and aid fast sight acquisition.
• Dual bead sights give a quick, intuitive reference for wingshooting and close-range work.
• The bore is smooth rather than rifled, matching its role as a shotshell barrel rather than a slug gun.
• Three Accu-Choke tubes are included, covering Improved Cylinder, Modified, and Full constrictions.
• The choke tube wrench needed to swap constrictions ships in the box.
• Finish is blued steel for classic looks and everyday corrosion resistance.
• It fits Mossberg 500 and Maverick 88 six-shot models specifically, not the 500 Cruiser or Chainsaw.

Frequently Asked Questions

Does this barrel include chokes? Yes, it ships with a 3-piece Accu-Choke set (Improved Cylinder, Modified, Full) along with the choke tube wrench.

Will this fit a Mossberg 500 Cruiser or Chainsaw? No, this barrel is built for standard 12 gauge Mossberg 500 and Maverick 88 six-shot models and does not fit the Cruiser or Chainsaw variants.

Is the bore rifled? No, it is a smoothbore, all-purpose shotshell barrel rather than a rifled slug barrel.

Buy the Mossberg 12 Gauge All-Purpose Barrel

Swap in a factory-correct Mossberg barrel and get back in the field without waiting on a gunsmith. This barrel drops onto compatible 500 and Maverick 88 receivers and covers turkey, dove, and waterfowl loads with its included choke set. Shop the rest of our shotgun barrels lineup and order from our Lubbock, Texas gun shop for fast, direct shipping.