Mitchell Defense The DOC AR-15 .300 BLK 10.3in Upper Receiver Chrome-Moly Barrel Black Finish M-LOK Free-Float Handguard
$1,225.50 at OpticsPlanet
In stock Sale
Mitchell Defense The DOC AR-15 .300 BLK 7.5in Upper Receiver Chrome-Moly Barrel Black Finish M-LOK Free-Float Handguard
Mitchell Defense · Upper Receiver
No ratings yetBest price
$1,225.50at OpticsPlanet
Out of stock Sale checked Oct 22, 2026
In stock now instead
- Mitchell Defense The DOC AR-15 .300 BLK 10.3in Upper Receiver C… $1,225.50at OpticsPlanet
- Mitchell Defense The DOC AR-15 .300 BLK 10.3in Upper Receiver C… $1,225.50at OpticsPlanet
- Maxim Defense Industries MDX 508 U.R.G. AR-15 .300 AAC Blackout… $1,255.50at MidwayUSA
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $1,225.50Salechecked Oct 22, 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.
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Price history
Dashed line = out of stock. Tracking since Oct 15, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| OpticsPlanet | $1,225.50 | $1,225.50 | $1,225.50 |
Since Oct 15, 2026.
About this part
The Mitchell Defense The DOC AR-15 .300 BLK 7.5in Upper Receiver Chrome-Moly Barrel Black Finish M-LOK Free-Float Handguard is a 7.5" 300 Blackout upper receiver from Mitchell Defense. One store lists it, OpticsPlanet at $1,225.50.
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
- 7.5" · Handguards
Specifications
- Manufacturer
- Mitchell Defense
- Color
- Black
- Platform
- AR-15
- Caliber
- 300 Blackout
From the manufacturer
Mitchell Defense The DOC AR-15 .300 BLK 7.5in Upper Receiver Chrome-Moly Barrel Black Finish M-LOK Free-Float Handguard. 5in .300 Blackout Upper Receiver is built for compact maneuverability and reliable suppressed performance. The 7075-T6 billet upper receiver features Mitchell Defense's thermal-fit barrel seat to reinforce structural integrity and improve accuracy under rapid firing. Its 7.5in barrel is optimized for close-quarters performance offering balanced rigidity and consistent terminal effect with subsonic and supersonic loads. An adjustable gas block comes standard allowing precise tuning for suppressed and unsuppressed use. The ArmorLube Carbon Cutter BCG with a Carpenter 158 HP/MPI bolt ensures smooth durable cycling with reduced carbon fouling paired with a free-float M-LOK handguard for lightweight modularity. Finished in E-Series Cerakote this upper is ideal for compact defensive builds and suppressed applications. Specifications for Mitchell Defense The DOC AR-15 .300 BLK 7.5in Upper Receiver: Manufacturer: Mitchell Defense Caliber: .300 AAC Blackout Overall Length: 16.2 in Barrel Length: 7.5 in Barrel Profile: Standard Gas System Length: Pistol Length Barrel Twist Rate: 1-5 Firearms Threads Per Inch: Non Threaded Muzzle Device: A2 Flash Hider Finish: Nitride Color: Black Gun Model: AR-15 Fabric/Material: 4150 CrMoV Gun Make: AR Platform Bolt Carrier Group Included: MIL-SPEC Charging Handle Included: MIL-SPEC Country of Origin: USA Features of Mitchell Defense The DOC AR-15 .300 BLK 7.5in Upper Receiver Adjustable gas block for tuning subsonic and supersonic loads 7075-T6 billet upper with thermal-fit barrel seat for improved rigidity ArmorLube Carbon Cutter BCG with C158 HP/MPI bolt for maximum reliability Lightweight free-float M-LOK handguard for accessory flexibility Package Contents: Mitchell Defense The DOC AR-15 .300 BLK 7.5in Upper Receiver What firearm models does the manufacturer say Mitchell Defense The DOC AR-15 .300 BLK 7.5in Upper Receiver is compatible with? The manufacturer suggests that Mitchell Defense The DOC AR-15 .300 BLK 7.5in Upper Receiver is compatible with AR-15Mitchell Defense 411121: The DOC AR-15 .300 BLK 7.5in Upper Receiver Chrome-Moly Barrel Black Finish M-LOK Free-Float Handguard
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