Resolute Mk4 300BLK Assembl Upper 14.5"bbl W/P&W Brake BLK
$493.49 at Ammunition Depot · 3 stores
In stock
Best price
$452.49at Ammunition Depot
In stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Ammunition Depot Best price | $452.49checked Oct 1, 2026 | In stock | Buy at Ammunition Depot | |
| OpticsPlanet | $489.99Salechecked Oct 1, 2026 | In stock | Buy at OpticsPlanet | |
| GunMag Warehouse | $609.99checked Oct 1, 2026 | In stock | Buy at GunMag Warehouse | |
| Palmetto State Armory | $514.99checked Oct 1, 2026 | Check store | Buy at Palmetto State Armory | |
| Brownells | $595.38checked Oct 1, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $452.49 at Ammunition Depot. Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | $452.49 | $452.49 | $452.49 |
| Brownells | $595.38 | $595.38 | $595.38 |
| GunMag Warehouse | $609.99 | $609.99 | $609.99 |
| OpticsPlanet | $489.99 | $489.99 | $489.99 |
| Palmetto State Armory | $514.99 | $514.99 | $514.99 |
Since Sep 28, 2026.
About this part
The Resolute Mk4 300BLK Assembled Upper Rcvr 16.1" Bbl Black is an AR-15 complete upper receiver from CMMG. It's sold by 5 stores (3 in stock), from $452.49 to $609.99. The lowest in-stock price in the last 30 days was $452.49 at Ammunition Depot.
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
- 16.1" · Handguards
Specifications
- Manufacturer
- CMMG
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 300 Blackout
From the manufacturer
CMMG RESOLUTEA(R) MK4 300 BLACKOUT ASSEMBLED UPPER RECEIVER Top off your next build with this RESOLUTEA(R) Mk4 Upper Group. Chambered in 300BLK, this upper group is a staple for any collection. This upper group does NOT include BCG or charging handle. SPECS Platform: Mk4 Caliber: 300BLK Operating System: Direct Impingement Barrel Length: 16.1" Barrel Twist: 1:7 Barrel Contour: MT Barrel Material: 4140CM, SBN Muzzle Device: CMMG A2 Flash Hider Muzzle Thread: 1/2 x 28 Gas Port Location: Mid Gas Block: Non-Adjustable 0.750" Upper Receiver: Billet 6061 T6 Alumin Mfg: Cmmg
Similar upper receiver
300BLK 10.5" Medium Pistol Bbl Complete Upper Receiver
$339.99 at OpticsPlanet · 3 stores
In stock Sale
300BLK 7.5" Medium Pistol Bbl Complete Upper Receiver
$329.99 at OpticsPlanet · 3 stores
In stock Sale
Tacfire 16" Complete Upper Assembly .300 AAC Blackout 1:8, Black
$269.99 at GunMag Warehouse · 7 stores
In stock
Tacfire 10" Complete Upper Assembly .300 AAC Blackout 1:8, Black
$254.99 at GunMag Warehouse · 6 stores
In stock
AR-15 Billet Upper Receiver Assembled
$246.95 at MidwayUSA · 4 stores
In stock
Rating
No ratings yet
Log in to rate this part.
Comments
Please log in to read and leave comments.