| Platform | Mk4 |
| 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 Device | CMMG ZEROED Linear Compensator |
| Muzzle Thread | 1/2 x 28 |
| Gas Port Location | Micro |
| Gas Block | FourSix Specific .750 |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Hand Guard | CMMG EML7 M-LOK |
| Finish | Cerakote Standard |
| Charging Handle | CMMG ZEROED Ambi |
| Weight | 3.2 lbs |
| Length | 16.5" |
Expected to ship within 10 business days. Build to Order products are items that are not built but all components are in stock and ready for assembly.
THIS PRODUCT IS BACKED BY THE CMMG LIFETIME QUALITY GUARANTEE.
UPPER GROUP, BANSHEE, Mk4, 4.6X30MM, 8"
CMMG® was the first to bring a 4.6x30mm firearm to the U.S. civilian market, continuing a tradition of innovation, shooters everywhere can now build a light recoiling, flat shooting PDW (personal defense weapon) like no other. Designed to work with any standard AR15 lower receiver and our 4.6x30mm magazines. Available in different Cerakote finishes, all CMMG® Upper Groups come complete with bolt carrier group and ZEROED™ accessories including:
ZEROED AR15 Polymer Dust Cover
ZEROED AR15 Ambi Charging Handle
ZEROED Linear Compensator 5.56mm
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.