| Caliber | 4.6x30mm |
| Operating System | Direct Impingement |
| Barrel Length | 8 |
| Barrel Twist | 1:5.9 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, SBN |
| Barrel Twist | 1:5.9 |
| Muzzle Thread | 1/2 x 28 |
| Gas Port Location | Micro |
| Gas Block | FourSix Specific .750 |
| Weight | 3 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.
Barrel and BCG Kit, 8" 4140, SBN, 4.6x30MM
CMMG® brought the first 4.6x30mm firearm to the U.S. civilian market. Now, those that want to build their own 4.6x30mm AR15 from the ground up have everything they need. Combine the Barrel and BCG Kit with the mil-spec AR15 upper and handguard of your choice and all you will need after that is a standard AR15 lower receiver group and some of our 4.6x30mm Magazines and you're ready to roll!
**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.