Diamondback115735854
Diamondback 7.62x39mm 7" Black Nitride 4150 Chrome Moly Vanadium Steel Barrel$87.50
Availability: In Stock
If you're building or rebuilding an AR-15 platform rifle, a quality barrel is where precision starts. The Diamondback 5.56 NATO 16" M4 Contour Black Nitride 4150 Chrome Moly Vanadium Steel OEM Replacement Barrel gives you a modern, durable tube that meets the performance standard of factory-original AR components—without the factory price tag. Built from 4150 chrome moly vanadium steel and finished in black nitride, this barrel is engineered for reliability across everything from range days to hunting and tactical work.
The M4 contour profile is the working standard for modern 5.56 rifles: it's lighter than a government profile but stiff enough for accuracy, and it plays well with standard rail systems and handguards. At 16 inches, you get a balance that works in the field—enough velocity for duty and hunting rounds without the length penalty if you're running an 80-series lower or short-barreled platform. The 4150 steel and nitride finish mean you're not babying it on the gun; this barrel is built to run.
Whether you're swapping a worn-out factory barrel or assembling your own upper, this is a straightforward, no-nonsense component from a maker who understands what shooters actually need. Drop it in, headspace it, and get to work.
| Caliber | 5.56 NATO |
| Barrel Length | 16" |
| Profile | M4 Contour |
| Material | 4150 Chrome Moly Vanadium Steel |
| Finish | Black Nitride |
Yes. This is a standard 5.56 NATO barrel with OEM-spec dimensions and headspace. It will fit any mil-spec AR-15 upper receiver. You'll need to verify headspace during assembly using a headspace gauge set—standard practice for any barrel replacement.
A 5.56 NATO chamber safely fires both 5.56 NATO and .223 Remington ammunition. The difference is in how the cartridges are specified; a 5.56 chamber has slightly tighter specs to safely handle both. Your rifle will run both rounds reliably.
Yes. The 16-inch M4 profile barrel is a practical choice for hunting applications where a modern carbine platform is appropriate. Ballistics and accuracy will depend on your ammunition, optics, and shooting skill.
You'll need a barrel wrench, upper receiver vice block, and a headspace gauge set to properly install and check the barrel. Assembly should be done by someone experienced with AR-15 builds or a qualified gunsmith.
SKU: 115719770 • Width: 1.4in • Height: 1.4in • Depth: 18.1in • Weight: 1.8oz
Availability: In Stock
If you're building or rebuilding an AR-15 platform rifle, a quality barrel is where precision starts. The Diamondback 5.56 NATO 16" M4 Contour Black Nitride 4150 Chrome Moly Vanadium Steel OEM Replacement Barrel gives you a modern, durable tube that meets the performance standard of factory-original AR components—without the factory price tag. Built from 4150 chrome moly vanadium steel and finished in black nitride, this barrel is engineered for reliability across everything from range days to hunting and tactical work.
The M4 contour profile is the working standard for modern 5.56 rifles: it's lighter than a government profile but stiff enough for accuracy, and it plays well with standard rail systems and handguards. At 16 inches, you get a balance that works in the field—enough velocity for duty and hunting rounds without the length penalty if you're running an 80-series lower or short-barreled platform. The 4150 steel and nitride finish mean you're not babying it on the gun; this barrel is built to run.
Whether you're swapping a worn-out factory barrel or assembling your own upper, this is a straightforward, no-nonsense component from a maker who understands what shooters actually need. Drop it in, headspace it, and get to work.
| Caliber | 5.56 NATO |
| Barrel Length | 16" |
| Profile | M4 Contour |
| Material | 4150 Chrome Moly Vanadium Steel |
| Finish | Black Nitride |
Yes. This is a standard 5.56 NATO barrel with OEM-spec dimensions and headspace. It will fit any mil-spec AR-15 upper receiver. You'll need to verify headspace during assembly using a headspace gauge set—standard practice for any barrel replacement.
A 5.56 NATO chamber safely fires both 5.56 NATO and .223 Remington ammunition. The difference is in how the cartridges are specified; a 5.56 chamber has slightly tighter specs to safely handle both. Your rifle will run both rounds reliably.
Yes. The 16-inch M4 profile barrel is a practical choice for hunting applications where a modern carbine platform is appropriate. Ballistics and accuracy will depend on your ammunition, optics, and shooting skill.
You'll need a barrel wrench, upper receiver vice block, and a headspace gauge set to properly install and check the barrel. Assembly should be done by someone experienced with AR-15 builds or a qualified gunsmith.
SKU: 115719770 • Width: 1.4in • Height: 1.4in • Depth: 18.1in • Weight: 1.8oz