CMMG Mk4 Resolute Upper Receiver Group 5.56x45mm NATO 16.1in Armor Black
$849.99 at MidwayUSA · 2 stores
In stock
CMMG 5.7X28mm Banshee Upper Group Receiver 5in 1-9 Twist 1/2 X 28 TPI 13.8in Tungsten
No ratings yetBest price
$849.99at 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 | $849.99Salechecked 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 | $849.99 | $849.99 | $849.99 |
Since Oct 13, 2026.
About this part
The CMMG 5.7X28mm Banshee Upper Group Receiver 5in 1-9 Twist 1/2 X 28 TPI 13.8in Tungsten is a 5" AR-15 upper receiver from CMMG. One store lists it, OpticsPlanet at $849.99.
Fits and works with
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 5" · Handguards
Specifications
- Manufacturer
- CMMG
- Color
- Tungsten
- Platform
- AR-15
From the manufacturer
CMMG 5.7X28mm Banshee Upper Group Receiver 5in 1-9 Twist 1/2 X 28 TPI 13.8in Tungsten. 7x28mm has proven itself to be well suited for the job. With incredibly flat shooting performance and low recoil 5.7x28 excels at closer ranges while still providing ideal penetration. Equipped with a 5 barrel this is the most compact 5.7x28mm upper group CMMG offers. CMMG 5.7x28mm uppers are designed to work with CMMG Mk57 lowers or standard AR15/Mk4 lowers (when used with 5.7 AR Conversion Mags). Specifications for CMMG 5.7X28mm 5in Banshee Upper Group Receiver: Manufacturer: CMMG Caliber: 5.7x28mm Overall Length: 13.8 in Barrel Length: 5 in Barrel Profile: Medium Tapered Barrel Twist Rate: 1-9 Firearms Threads Per Inch: 1/2x28 Muzzle Device: CMMG Zeroed Linear Compensator Finish: Cerakote Gun Rail: M-LOK Gun Type: Rifle Gun Make: AR Platform Gun Model: Universal Magazine Included: No Mount Type: M-LOK Package Contents: CMMG 5.7X28mm 5in Banshee Upper Group Receiver What firearm models does the manufacturer say CMMG 5.7X28mm 5in Banshee Upper Group Receiver is compatible with? The manufacturer says that CMMG 5.7X28mm 5in Banshee Upper Group Receiver is compatible with UniversalCMMG 57BBCF0-TNG: 5.7X28mm Banshee Upper Group Receiver 5in 1-9 Twist 1/2 X 28 TPI 13.8in Tungsten
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