11.5" Super Duty Series 5.56 NATO Barrel - 1:7 Twist | Carbine Gas

Old Testament Firearms 11.5" Mod-1 AR15 Barrel

Our barrels are produced from raw bar stock to finished product with the highest standards.  We drill, ream, rifle, contour and assemble each barrel with our robotic driven production line ensuring exceptional quality and tolerance at each process.  Each barrel is properly stress relieved after rifling, and extensions are torqued after nitride.

Quality control systems ensure that all barrels are dimensionally correct and bores fall within their individual tolerance.  These barrels are the best value on the market!

• 11.5" length
• 5.56 NATO Chamber
• Carbine length gas system
• 1:7 RH twist
• 4150 CMV
• Stress relieved after rifling
• Black Nitride finish by H&M
• M4 extension
• .070" gas port
• Weight: 21.6 ounces
• 100% USA Made