Resolute Mk4 300BLK Assembled Upper Rcvr 16.1" Bbl Black
$452.49 at Ammunition Depot · 5 stores
In stock
Best price
$493.49at Ammunition Depot
In stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Ammunition Depot Best price | $493.49checked Oct 1, 2026 | In stock | Buy at Ammunition Depot | |
| OpticsPlanet | $519.99Salechecked Oct 1, 2026 | In stock | Buy at OpticsPlanet | |
| Brownells | $595.38checked Oct 1, 2026 | In 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: $493.49 at Ammunition Depot. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | $493.49 | $493.49 | $493.49 |
| Brownells | $595.38 | $595.38 | $595.38 |
| OpticsPlanet | $519.99 | $519.99 | $519.99 |
Since Sep 27, 2026.
About this part
The Resolute Mk4 300BLK Assembl Upper 14.5"bbl W/P&W Brake BLK is an AR-15 complete upper receiver from CMMG. It's sold by 3 stores (3 in stock), from $493.49 to $595.38. The lowest in-stock price in the last 30 days was $493.49 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
- 14.5" · Handguards
Specifications
- Manufacturer
- CMMG
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 300 Blackout
- Barrel length
- 14.5"
From the manufacturer
CMMG RESOLUTEA(R) MK4 300BLK ASSEMBLED UPPER RECEIVER W/P&W BRAKE The carbine upper that keeps it simple. Chambered in 300BLK, this RESOLUTE upper group's 14.5" barrel comes with the ZEROED SVD muzzle brake pinned & welded to the muzzle. This is the perfect choice when you want to go as short as possible while still meeting overall length requirements for rifle barrels, so no NFA rules or SBR registration. This upper group does NOT include BCG or charging handle. SPECS Platform: Mk4 Caliber: 300BLK Operating System: Direct Impingement Barrel Length: 14.5" Barrel Twist: 1:7 Barrel Cont Mfg: Cmmg
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