The Mossberg XBBL 870 12-gauge shotgun with 24" RS barrel is a purpose-built slug gun for deer hunters who demand rifled accuracy in a platform that handles everything from buckshot patterns to precision rifle slugs. Built on the legendary 870 platform, this barrel swap gives you a dedicated slugger without buying a whole new shotgun—the fully-rifled bore delivers the accuracy modern hunters expect when shooting lead downrange at distance.
The 24" rifled slug barrel pairs with adjustable rifle sights, letting you dial in your point of aim quickly in the field. Blued steel finish provides classic Mossberg durability and that no-nonsense working gun aesthetic. This is a serious option for shotgunners who've outgrown smoothbore slugs or who hunt terrain that demands precision over spread.
Important: this barrel is not compatible with 870 12-gauge 3.5" Magnum receivers—confirm your shotgun's chamber before ordering. If you run a standard 2.75" or 3" Mossberg 870, you're ready to swap and hunt.
| Gauge | 12 |
| Barrel Length | 24" |
| Bore Type | Fully rifled |
| Sights | Adjustable rifle sights |
| Finish | Blued |
| Compatibility | Not compatible with 870 12-gauge 3.5" Magnum models |
This 24" rifled slug barrel fits standard Mossberg 870 12-gauge receivers chambered in 2.75" or 3". It is not compatible with 870 12-gauge 3.5" Magnum models. Verify your shotgun's chamber marking before purchasing.
The fully-rifled bore is designed for slug rounds. Confirm your shotgun's chamber length (2.75" or 3") and use ammunition rated for that specification.
Mossberg 870 barrels are designed as drop-in components, but if you're not comfortable doing the swap yourself, have a qualified gunsmith verify fitment and function before use.
Mossberg
Remington
