Mossberg OEM 12 Gauge 18.5-inch Security Barrel

The Mossberg OEM 12 Gauge Security Barrel (Mossberg part no. 90015) is an 18.5-inch replacement barrel built for 12-gauge Mossberg 500 and Maverick 88 six-shot pump shotguns. It carries a fixed bead sight for fast, instinctive target acquisition and a cylinder bore that opens up shot patterns for close-range defensive or security work. Mossberg finishes the barrel in a traditional blued steel for corrosion resistance and a classic look that matches factory-original 500-series shotguns. This barrel is not a direct fit for the 500 Cruiser or 500 Chainsaw variants, so confirm your specific model before ordering.

Key Specifications

• Measures 18.5 inches long, the standard security-length barrel for the 500 platform.
• Bored for 12 gauge shotshells.
• Features a cylinder bore that opens patterns for close-range use.
• Includes a fixed bead sight for fast, instinctive aiming.
• Finished in traditional blued steel for corrosion resistance.
• Fits Mossberg 500 and Maverick 88 six-shot models.
• Not compatible with the 500 Cruiser or 500 Chainsaw variants.
• Chamber: 3-inch chamber length.
• Versatility: smooth cylinder bore suits buckshot, birdshot, and rifled slugs.

Frequently Asked Questions

What shotguns does this barrel fit? It fits 12-gauge Mossberg 500 and Maverick 88 six-shot models.

Will this fit a 500 Cruiser or Chainsaw model? No, Mossberg notes this barrel is not directly compatible with the 500 Cruiser or 500 Chainsaw.

What sight does this barrel use? It includes a fixed bead sight rather than rifle-style sights.

Buy the Mossberg OEM 12 Gauge Security Barrel

Swap in a factory-spec 18.5-inch security barrel and get your 500 or Maverick 88 back to full capability. Order it from our Lubbock, Texas gun shop and we will get it moving as soon as it is ready to ship, no FFL required since a bare replacement barrel is not a regulated firearm part. Shop more from Mossberg or browse our shotgun barrels selection for more options.