CMMG Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver 1-3 Twist 5/8 x 24 CMMG ZEROED Muzzle Brake Cerakote Armor Black
$905.99 at Ammunition Depot · 3 stores
In stock
Best price
$799.99at OpticsPlanet
Out of stock Sale checked Oct 22, 2026
In stock now instead
- CMMG Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver 1-3 Twi… $905.99at Ammunition Depot
- CMMG Dissent 6.50" Upper .300 AAC Blackout with 1:7 Twist Rate … $1,024.99at GunMag Warehouse
- Dark Storm Industries DS-15 AR-15 .300 AAC Blackout 12.5 inch U… $799.95at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $799.99Salechecked Oct 22, 2026 | Out of stock | Buy at OpticsPlanet |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Similar upper receivers in stock
This part is out of stock at every store we track. These similar upper receivers are in stock, with today's prices.
CMMG Dissent 6.50" Upper .300 AAC Blackout with 1:7 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black
$1,024.99 at GunMag Warehouse · 4 stores
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Dark Storm Industries DS-15 AR-15 .300 AAC Blackout 12.5 inch Upper Receiver SOCOM Profile Pistol Length 1-7 Twist Firestorm Compensator Magpul MVG
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Dark Storm Industries DS-15 AR-15 Typhoon .300 AAC Blackout 7.5in Upper Receiver Pistol Length 1-8 Twist 5/8x24 Cerakote Olive Drab Green
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Rock River Arms Completed Upper Receiver Coyote Carbine .300 AAC Blackout 16 Inch Barrel 1-8 Twist 5/8-24 Thread Free-Float Handguard Vortex Flash
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Price history
Dashed line = out of stock. Tracking since Oct 14, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| OpticsPlanet | $799.99 | $799.99 | $799.99 |
Since Oct 14, 2026.
About this part
The CMMG Mk4 .300BLK Banshee Upper Group Receiver 12.5in Titanium is a 12.5" 300 Blackout upper receiver from CMMG. One store lists it, OpticsPlanet at $799.99.
Fits and works with
- Caliber
- 300 Blackout · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Barrel length
- 12.5" · Handguards
Specifications
- Manufacturer
- CMMG
- Platform
- AR-15
- Caliber
- 300 Blackout
From the manufacturer
CMMG Mk4 .300BLK Banshee Upper Group Receiver 12.5in Titanium. With the 12.5 BANSHEE upper group you can build your next 300BLK AR with character like no other. Specifications for CMMG Mk4 .300BLK 12.5in Banshee Upper Group Receiver: Manufacturer: CMMG Caliber: .300 AAC Blackout Overall Length: 20.8 in Barrel Length: 12.5 in Barrel Profile: Medium Gas System Length: Pistol Length Barrel Twist Rate: 1-7 Muzzle Device: CMMG Zeroed Linear Compensator Fabric/Material: 6061-T6 Aluminum Gas Block Journal Size-Diameter: .750 in Gun Rail: M-LOK Gun Type: Rifle Gun Make: CMMG Gun Model: CMMG Mk4 Weight: 3.7 lb Magazine Included: No Mount Type: M-LOK Package Contents: CMMG Mk4 .300BLK 12.5in Banshee Upper Group Receiver What firearm models does the manufacturer say CMMG Mk4 .300BLK 12.5in Banshee Upper Group Receiver is compatible with? The manufacturer suggests that CMMG Mk4 .300BLK 12.5in Banshee Upper Group Receiver is compatible with CMMG Mk4CMMG 30B8A6F-TI: Mk4 .300BLK Banshee Upper Group Receiver 12.5in Titanium
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