CMMG Mk4 Resolute Upper Receiver Group 5.56x45mm NATO 16.1in Armor Black
$849.99 at MidwayUSA · 2 stores
In stock
Best price
$839.99at OpticsPlanet
Out of stock Sale checked Oct 23, 2026
In stock now instead
- CMMG Mk4 Resolute Upper Receiver Group 5.56x45mm NATO 16.1in Ar… $849.99at MidwayUSA
- CMMG Mk4 Resolute Upper Receiver Group 6.5mm Grendel 16.1in Arm… $849.99at MidwayUSA
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $839.99Salechecked Oct 23, 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 Mk4 Resolute Upper Receiver Group 6.5mm Grendel 16.1in Armor Black
$849.99 at MidwayUSA · 2 stores
In stock
Price history
Dashed line = out of stock. Tracking since Oct 13, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| OpticsPlanet | $839.99 | $839.99 | $839.99 |
Since Oct 13, 2026.
About this part
The CMMG 5.7X28mm Banshee Upper Group Receiver 8in Midnight Bronze is an 8" AR-15 upper receiver from CMMG. One store lists it, OpticsPlanet at $839.99.
Fits and works with
- Barrel length
- 8" · Handguards
Specifications
- Manufacturer
- CMMG
- Color
- Bronze
- Platform
- AR-15
From the manufacturer
CMMG 5.7X28mm Banshee Upper Group Receiver 8in Midnight Bronze. 7x28mm has quickly become one of the most popular chamberings in the PDW space. With the 8 BANSHEE upper group you can build the PDW AR15 of your dreams. Compatible with either CMMG Mk57 lowers or a standard AR15/Mk4 lower (when used with CMMG 5.7 AR Conversion Mags). Specifications for CMMG 5.7X28mm 8in Banshee Upper Group Receiver: Manufacturer: CMMG Caliber: 5.7x28mm Overall Length: 16.5 in Barrel Length: 8 in Barrel Profile: Medium Tapered Barrel Twist Rate: 1-9 Muzzle Device: CMMG Zeroed Linear Compensator Fabric/Material: 6061-T6 Aluminum Gun Rail: M-LOK Gun Make: CMMG Weight: 2.9 lb Magazine Included: No Mount Type: M-LOK Package Contents: CMMG 5.7X28mm 8in Banshee Upper Group Receiver CMMG 57B88BD-MB: 5.7X28mm Banshee Upper Group Receiver 8in Midnight Bronze
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