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
No ratings yetBest price
$905.99at Ammunition Depot
In stock checked Nov 3, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Ammunition Depot Best price | $905.99checked Nov 3, 2026 | In stock | Buy at Ammunition Depot | |
| OpticsPlanet | $949.99Salechecked Nov 3, 2026 | In stock | Buy at OpticsPlanet | |
| Palmetto State Armory | $937.99checked Nov 3, 2026 | Check store | Buy at Palmetto State Armory | |
| Classic Firearms | $999.87checked Nov 3, 2026 | Check store | Buy at Classic Firearms |
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: $905.99 at Ammunition Depot. Dashed line = out of stock. Tracking since Oct 12, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | $905.99 | $905.99 | $905.99 |
| Classic Firearms | $999.87 | $999.87 | $999.87 |
| OpticsPlanet | $949.99 | $949.99 | $949.99 |
| Palmetto State Armory | $937.99 | $937.99 | $937.99 |
Since Oct 12, 2026.
About this part
The 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 is a 16.1" 300 Blackout upper receiver from CMMG. It's sold by 4 stores (2 in stock), from $905.99 to $999.87. The lowest in-stock price in the last 30 days was $905.99 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
- Muzzle thread
- 5/8x24 · Muzzle devices
- Barrel length
- 16.1" · Handguards
Specifications
- Manufacturer
- CMMG
- Color
- Black
- Platform
- AR-15
- Caliber
- 300 Blackout
From the manufacturer
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. 6 BLK in one word it would "Versatile". 8.6 BLK learned from the successes of it's smaller older brother 300 BLK lending itself very well to subsonic suppressed use and excelling with supersonic ammo when hitting the target hard matters. There can be a lot of confusion with .308 AR platforms and compatibility CMMG has kept it simple by basing our Mk3 platform off the popular Gen 1 DPMS High-Pattern LR308 design which means greater parts availability and more customization potential. Available in seven different Cerakote finishes all CMMG Upper Groups come complete with bolt carrier group and ZEROED accessories. Specifications for CMMG Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver: Manufacturer: CMMG Caliber: 8.6mm Blackout Barrel Length: 16.1 in Barrel Twist Rate: 1-3 Muzzle Device: ZEROED Muzzle Brake Finish: Cerakote Gun Type: Rifle Gun Make: CMMG Gun Model: CMMG Mk3 Barrel Material: 4140 Chrome Moly Vanadium Features of CMMG Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver Lifetime Quality Guarantee Package Contents: CMMG Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver ZEROED Mk3 Polymer Dust Cover ZEROED AR10/Mk3 Ambi Charging Handle ZEROED Muzzle Brake 8.6 BLK What firearm models does the manufacturer say CMMG Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver is compatible with? The manufacturer says that CMMG Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver is compatible with CMMG Mk3CMMG 33BFA0C-AB: Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver 1-3 Twist 5/8 x 24 CMMG ZEROED Muzzle Brake Cerakote Armor Black
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