| Platform | Mk4 |
| Caliber | 5.56x45mm |
| Operating System | Direct Impingement |
| Barrel Length | 10.5 |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, SBN |
| Barrel Twist | 1:7 |
| Muzzle Device | CMMG ZEROED Linear Compensator |
| Muzzle Thread | 1/2 x 28 |
| Gas Port Location | Carbine |
| Gas Block | 0.750 Non-Adjustable |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Hand Guard | CMMG EML9 M-LOK |
| Finish | Cerakote Standard |
| Charging Handle | CMMG ZEROED Ambi |
| Weight | 3.5 lbs |
| Length | 18.8" |
Please Allow 15-30 Days To Process Your Order.
State/local restrictions may apply in CA, CO, CT, DE, DC, HI, IL, MD, MA, MI, NJ, NY, or WA. Customers must review our Firearms Shipping Policy prior to ordering.
Firearms with attached pistol brace. Please confirm your FFL is accepting transfers for pistol brace equipped firearms prior to ordering.
UPPER GROUP, BANSHEE, Mk4, 5.56X45MM NATO, 10.5"
At just 10.5” this is the shortest 5.56mm upper group CMMG® offers. Great for anyone looking to build an ultra-compact AR15 that’s lightweight and perfectly sized to go anywhere. This 5.56mm BANSHEE™ upper group is built on our Mk4 – AR15 platform, 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.