CMMG Banshee Mk4 AR-15 Upper Group .338 ARC 10.5" Barrel Black
$818.72
CMMG Banshee Mk4 AR-15 Upper Group .338 ARC 10.5″ Barrel Black
This .338 ARC upper group combines the AR15 platform with large-bore caliber stopping power. Featuring a 1:8 twist rate and utilizing the same bolt as 6.5 Grendel AR15s, this product is designed for maximum parts compatibility. Chambered in .338 ARC.
Out of stock
Made to combine the prowess of the AR15 platform with the stopping power of a large bore caliber 338 ARC strives to emulate the sub or supersonic versatility of the now ubiquitous 300 BLK cartridge with more energy on target and less gas system tuning when switching from suppressed to unsuppressed.
To maximize parts compatibility 338 ARC utilizes the same bolt as 6.5 Grendel AR15s. For those that like to load their own ammo CMMG 338 ARC barrels feature a slower 1:8 twist rate to allow the use of more traditional construction .338 caliber projectiles. Pistol options include DISSENT models with 6.5" 10.5" and 16.1" barrel lengths and BANSHEE models with 10.5" barrels.
- 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 Block: Non-Adjustable 0.750"
- Upper Receiver: Mk4 Billet 6061 T6 Aluminum
- Hand Guard: EML9
- Finish: Cerakote
- Charging Handle: Dissent Side Charger
- Weight: 3.1 lbs
| Weight | 4.007 lbs |
|---|---|
| Dimensions | 31.400 × 4.300 × 3.250 in |
| Manufacturer | Cmmg Inc. |
| Action | Direct Impingement |
| Caliber | .338 ARC |
| Barrel Length | 10.5 |
| Finish | Nitride |
| Frame Material | 4140CM |
| Twist Rate | 1:8 |
| Thread Pattern | 5/8 x 24 |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.
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