
Availability: In Stock
The Faxon Firearms Duty 5.56 12.5" carbine barrel is a no-nonsense replacement or upgrade barrel built for shooters who want a shorter, faster-handling rifle without sacrificing reliability. Chambered in 5.56 NATO and measuring 12.5 inches, this barrel delivers the compact footprint of a true carbine while maintaining the velocity and accuracy needed for defensive work, hunting, or general shooting. Faxon's reputation for quality machining and consistent performance makes this an excellent choice for anyone building or reconfiguring an AR platform rifle.
This barrel is constructed from 4150 Chrome-Moly-Vanadium (CMV) steel, the same material trusted in military and law enforcement applications for its strength and durability under sustained fire. The Mag Phosphate finish provides corrosion resistance and a professional look while standing up to field use and storage. The black chrome appearance rounds out the Duty Series aesthetic—rugged and purposeful without flash.
Whether you're swapping out a factory barrel, customizing your AR build, or setting up a dedicated defensive rifle, the Faxon 12.5" carbine barrel is engineered to work. It's the kind of component that lets you focus on the fundamentals—knowing your barrel will perform when you need it to.
| Barrel Length | 12.5" |
| Chambering | 5.56 NATO |
| Material | 4150 Chrome-Moly-Vanadium (CMV) Steel |
| Finish | Mag Phosphate (Black Chrome) |
| Series | Duty |
| Manufacturer | Faxon Firearms |
This is a direct replacement or new-build barrel for standard AR-15 rifles chambered in 5.56 NATO. Confirm your rifle's barrel extension and threading specifications before ordering.
A 12.5" 5.56 NATO barrel is effective for hunting applications where 5.56 is legal and appropriate. Muzzle velocity will be lower than longer barrels, so consider your intended game and distance carefully.
Faxon Firearms barrels are machined to tight tolerances and use quality materials like 4150 CMV. The Duty Series is designed for reliability and consistent performance, with a professional finish suited to demanding use.
We have the facts about the barrel itself, not what's included in the box. Contact us or Faxon Firearms directly for details on included documentation or installation support.

SKU: 152743716 • Width: 3.1in • Height: 1.2in • Depth: 19.4in • Weight: 1.5oz





Availability: In Stock
The Faxon Firearms Duty 5.56 12.5" carbine barrel is a no-nonsense replacement or upgrade barrel built for shooters who want a shorter, faster-handling rifle without sacrificing reliability. Chambered in 5.56 NATO and measuring 12.5 inches, this barrel delivers the compact footprint of a true carbine while maintaining the velocity and accuracy needed for defensive work, hunting, or general shooting. Faxon's reputation for quality machining and consistent performance makes this an excellent choice for anyone building or reconfiguring an AR platform rifle.
This barrel is constructed from 4150 Chrome-Moly-Vanadium (CMV) steel, the same material trusted in military and law enforcement applications for its strength and durability under sustained fire. The Mag Phosphate finish provides corrosion resistance and a professional look while standing up to field use and storage. The black chrome appearance rounds out the Duty Series aesthetic—rugged and purposeful without flash.
Whether you're swapping out a factory barrel, customizing your AR build, or setting up a dedicated defensive rifle, the Faxon 12.5" carbine barrel is engineered to work. It's the kind of component that lets you focus on the fundamentals—knowing your barrel will perform when you need it to.
| Barrel Length | 12.5" |
| Chambering | 5.56 NATO |
| Material | 4150 Chrome-Moly-Vanadium (CMV) Steel |
| Finish | Mag Phosphate (Black Chrome) |
| Series | Duty |
| Manufacturer | Faxon Firearms |
This is a direct replacement or new-build barrel for standard AR-15 rifles chambered in 5.56 NATO. Confirm your rifle's barrel extension and threading specifications before ordering.
A 12.5" 5.56 NATO barrel is effective for hunting applications where 5.56 is legal and appropriate. Muzzle velocity will be lower than longer barrels, so consider your intended game and distance carefully.
Faxon Firearms barrels are machined to tight tolerances and use quality materials like 4150 CMV. The Duty Series is designed for reliability and consistent performance, with a professional finish suited to demanding use.
We have the facts about the barrel itself, not what's included in the box. Contact us or Faxon Firearms directly for details on included documentation or installation support.
SKU: 152743716 • Width: 3.1in • Height: 1.2in • Depth: 19.4in • Weight: 1.5oz
