The 18" SPR profile barrel was designed to reduced weight while maintaining rigidity and accuracy. Chambered in 5.56 NATO with a 1/7 twist rate and a rifle-length gas system.
| Thread Pitch | 1/2x28 |
|---|---|
| Barrel Weight | 2.6 lbs |
| Caliber | 5.56 NATO |
| Barrel Length | 18" |
| Barrel Material | 4150 CMV - Nitride |
| Barrel Finish | QPQ |
| Gas Block Journal | .750" |
| Barrel Extension | M4 |
| Weight (oz) | - |