| Platform | Mk4 |
| Caliber | .338 ARC |
| Operating System | Compact Action-Direct Impingement |
| Barrel Length | 10.5 |
| Barrel Twist | 1:8 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, Nitride Finish |
| Barrel Twist | 1:8 |
| Muzzle Device | CMMG ZEROED Linear Compensator |
| Muzzle Thread | 5/8 x 24 |
| Gas Port Location | Pistol |
| Gas Block | Non-Adjustable 0.750" |
| Upper Receiver | Mk4 Billet 6061 T6 Aluminum |
| Lower Receiver | Mk4 Forged 7075 T6 Aluminum |
| Hand Guard | EML9 |
| Finish | Cerakote |
| Charging Handle | CMMG ZEROED Ambi |
| Pistol Grip | CMMG ZEROED Pistol Grip |
| Stock / Brace | CMMG RipStock |
| Trigger Type | ZEROED Drop-In Single Stage |
| Safety Selector | CMMG ZEROED 60/90 Degree |
| Magazine | (1) 10 rd CMMG 338 ARC |
| Weight | 5.6 lbs |
| Length | 26.5" |
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.
SBR, BANSHEE, Mk4, 338 ARC, 10.5"
With a large bore and a short length, the 338 ARC BANSHEE SBR delivers more energy on target and greater stopping power than 300 BLK while still being part of the AR15 platform, no matter if you prefer subsonic or supersonic ammo. A 1:8 barrel twist rate allows the use of a wide variety of 338 projectiles, from traditional lead core to monolithic.
Available in a variety of Cerakote finish options, the BANSHEE series represents the most innovative AR pistols and SBRs available today. From the quick deploying RIPBRACE® to the stylized receivers and EML™ handguards, every BANSHEE is tailor-made to be the personal defense weapon you can always depend on. With full-length M-LOK® slots on both sides and the bottom of the handguard as well as M-LOK between the top Picatinny rail sections, you’ll always have enough space for those must-have accessories.
Mk4 ZEROED parts and accessories – Quality comes standard
The AR15 platform is well known for its capability for customization but picking the right parts doesn’t have to be a nightmare of homework. Everything from the RIPBRACE to the full kit of ZEROED parts and accessories are made here in the USA with quality and attention to detail that is second to none and each BANSHEE comes equipped with a slew of ZEROED parts standard, including:
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.
~Firearms shipping to states with magazine capacity restrictions will only ship with 10rd magazines in place of standard capacity magazines. CMMG does not address any other state compliancy requirements for further restricted states.