| Caliber | 5.56x45mm |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 416SS |
| Barrel Twist | 1:7 |
| Muzzle Thread | 1/2 X 28 |
| Gas Port Location | Rifle |
| Gas Block | 0.750" |
| Finish | SBN |
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Barrel Sub-Assm, 18" MT 416SS SBN, 5.56mm
Perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. Made of 416 Stainless with an SBN Finish.