Maxim Defense Industries MDX 510 U.R.G. AR-15 7.62x39mm 10.3 inch Upper Receiver Pistol Length 1-10 Twist 5/8x24 HATEBRAKE Arid
$780.49 at OpticsPlanet
In stock Sale
Maxim Defense Industries MDX 508 U.R.G. AR-15 7.62x39mm 8.5 inch Upper Receiver Pistol Length 1-10 Twist 5/8x24 HATEBRAKE Urban
Maxim Defense · Upper Receiver
No ratings yetBest price
$1,092.29at OpticsPlanet
In stock Sale checked Oct 13, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $1,092.29Salechecked Oct 13, 2026 | In 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.
Price history
Lowest in-stock price in the last 30 days: $1,092.29 at OpticsPlanet. Dashed line = out of stock. Tracking since Oct 12, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| OpticsPlanet | $1,092.29 | $1,092.29 | $1,092.29 |
Since Oct 12, 2026.
About this part
The Maxim Defense Industries MDX 508 U.R.G. AR-15 7.62x39mm 8.5 inch Upper Receiver Pistol Length 1-10 Twist 5/8x24 HATEBRAKE Urban is an 8.5" 7.62x39 upper receiver from Maxim Defense. One store lists it, OpticsPlanet at $1,092.29. The lowest in-stock price in the last 30 days was $1,092.29 at OpticsPlanet.
Fits and works with
- Caliber
- 7.62x39 · Shop matching ammo
- Bolt
- 7.62x39 · Bolt carrier groups
- Gas system
- Pistol · Handguards
- Muzzle thread
- 5/8x24 · Muzzle devices
- Barrel length
- 8.5" · Handguards
Specifications
- Manufacturer
- Maxim Defense
- Platform
- AR-15
- Caliber
- 7.62x39
From the manufacturer
Maxim Defense Industries MDX 508 U.R.G. AR-15 7.62x39mm 8.5 inch Upper Receiver Pistol Length 1-10 Twist 5/8x24 HATEBRAKE Urban. It features an 8.5 barrel making it ideal for close-quarters situations. The included HATEBRAKE increases reliability and is tucked under the 9.5 handguard. These upper receiver groups ship complete including a Maxim Defense Mil-Spec or SCW bolt carrier group Radian Raptor charging handle and Maxim Defense hand stop ready to shoot right out of the box Specifications for Maxim Defense Industries MDX 508 U.R.G. AR-15 8.5 inch Upper Receiver: Manufacturer: Maxim Defense Industries Overall Length: 17.5 in Barrel Length: 8.5 in Muzzle Device: Hatebrake Finish: Cerakote Handguard Style: M-LOK w/ Top Picatinny Rail System Gun Model: AR-15 Barrel Material: 4150 Chrome Moly Vanadium Features of Maxim Defense Industries MDX 508 U.R.G. AR-15 8.5 inch Upper Receiver 1. Increased reliability due to included HATEBRAKE 2. Armorer level adjustable gas block 3. M-slot compatible handguard 4. Military-grade materials 17-4 Stainless Steel 7075 and 6061 Aluminum 5. HK height rail for a more rigid upper receiver 6. Installs on any Mil-Spec lower receiver 7. Comes with Mil-Spec or PDX BCG Package Contents: Maxim Defense Industries MDX 508 U.R.G. AR-15 8.5 inch Upper Receiver What firearm models does the manufacturer say Maxim Defense Industries MDX 508 U.R.G. AR-15 8.5 inch Upper Receiver is compatible with? The manufacturer suggests that Maxim Defense Industries MDX 508 U.R.G. AR-15 8.5 inch Upper Receiver is compatible with AR-15Maxim Defense Industries MXM-48114: MDX 508 U.R.G. AR-15 7.62x39mm 8.5 inch Upper Receiver Pistol Length 1-10 Twist 5/8x24 HATEBRAKE Urban
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