CMMG MK4 .300BLK Banshee Upper Group Receiver 12.5in Tungsten
3 options
- Coyote · Tanout of stock
- Midnight · Bronzeout of stock
- Tungsten, this page
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CMMG
Overview
The CMMG Mk4 .300BLK Banshee Upper Group Receiver features a complete assembly designed specifically for the AR-15 platform, making it a straightforward option for builders looking to enhance their firearm. With a 12.5-inch barrel chambered in .300 Blackout, it offers versatility for both suppressed and unsuppressed shooting, allowing for effective performance in various applications. This upper receiver is commonly utilized in compact builds aimed at close-quarters engagements, where maneuverability and firepower are essential.
Specifications
CMMG MK4 .300BLK Banshee Upper Group Receiver 12.5in Tungsten
3 options
- Coyote · Tanout of stock
- Midnight · Bronzeout of stock
- Tungsten, this page
Build history on GunPartPicker
Builders on GunPartPicker first added the CMMG MK4 .300BLK Banshee Upper Group Receiver 12.5in Tungsten to a build in March 2026.
Today the one retailer we track is out of stock. Listed prices start at $799.99 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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