HOMEParts & AccessoriesAR PartsOther AR Accessories & PartsCMMG Banshee Mk4 AR-15 Upper Group .338 ARC 10.5 Barrel Black
CMMG Banshee Mk4 AR-15 Upper Group .338 ARC 10.5 Barrel Black - CMMG - 338 ARC for sale at TheGunDock
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CMMG Banshee Mk4 AR-15 Upper Group .338 ARC 10.5 Barrel Black

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$766.00
$963.75 Save $197.75 (21%)
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SKU: Ch1185328
UPC: 840442506247
Model: 34B8D0F-AB
New ✓ In Stock — Ships in 1-3 Days
CMMG Banshee Mk4 AR-15 Upper Group .338 ARC 10.5 Barrel Black

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

UPC: 840442506247
338 ARC 10.50" Barrel 4.01 oz Cerakote Charging Handle: Dissent Side Charger Weight: 3.1 lbsUPC: 840442506247

Technical Specifications

Caliber 338 ARC
Barrel Length 10.50"
Finish Cerakote Charging Handle: Dissent Side Charger Weight: 3.1 lbsUPC: 840442506247
Weight 4.01 oz
Manufacturer CMMG
Model 34B8D0F-AB
SKU Ch1185328
UPC 840442506247
Availability In Stock

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  • Orders typically process within 1-2 business days
  • Ships via major carriers with tracking
  • Tracking information provided for all orders
  • Shipping costs calculated at checkout based on weight and destination

Return Policy

  • 30-day return policy on accessories and non-firearms
  • Items must be unused and in original packaging
  • Contact us for return authorization before shipping items back
  • Original shipping costs are non-refundable

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