| Platform | Mk3 |
| Caliber | 8.6 BLK |
| Barrel Length | 12.5 |
| Barrel Twist | 1:3 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, Nitride Finish |
| Barrel Twist | 1:3 |
| Muzzle Thread | 5/8 x 24 |
| Gas Port Location | Pistol |
| Finish | Nitride |
| Weight | 1.7 lbs |
AR Parts Notice - State/local restrictions may apply in CT, DC, IL, MA, NJ, NY, or WA. Customers must review our Shipping Policy prior to ordering.
12.5" 8.6 BLK Barrel
Kick off your 8.6 Blackout AR pistol or SBR build with a CMMG 12.5" barrel featuring our sleek, corrosion-resistant nitride finish. Compatible with CMMG Mk3 and DPMS Gen 1 High-Pattern LR-308 upper receivers.
Accepts 0.750" diameter gas blocks.
**All NFA rules apply** See linked CMMG Resource article for more information.
Lifetime Quality Guarantee
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.