CMMG MK4 .300BLK Banshee Upper Group Receiver 8in 1-7 Twist 5/8 X 24 TPI 16.5in Coyote Tan
3 options
- Coyote · Tan, this page
- Midnight · Bronzeout of stock
- Tungstenout of stock
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CMMG
Overview
The CMMG Mk4 .300BLK Banshee Upper Group Receiver features an 8-inch barrel designed specifically for the .300 Blackout caliber, making it ideal for both suppressed and unsuppressed shooting. With a 1:7 twist rate, this upper ensures optimal stabilization of a wide range of bullet weights, enhancing accuracy and performance. Commonly found in compact and tactical builds, this upper receiver is a solid choice for those looking to maximize versatility and effectiveness in their AR-15 platform.
Specifications
CMMG MK4 .300BLK Banshee Upper Group Receiver 8in 1-7 Twist 5/8 X 24 TPI 16.5in Coyote Tan
3 options
- Coyote · Tan, this page
- Midnight · Bronzeout of stock
- Tungstenout of stock
Build history on GunPartPicker
Builders on GunPartPicker first added the CMMG MK4 .300BLK Banshee Upper Group Receiver 8in 1-7 Twist 5/8 X 24 TPI 16.5in Coyote Tan to a build in June 2026.
Today the one retailer we track is out of stock. Listed prices start at $789.99 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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