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
$1,092.29 at OpticsPlanet
In stock Sale
Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit 7.62x39 14in Hate Brake 5/8-24 Thread 5.5in Barrel Type III Hardcoat Anodized Black
Maxim Defense · Upper Receiver
No ratings yetBest price
$1,615.50at OpticsPlanet
Out of stock Sale checked Oct 22, 2026
In stock now instead
- Maxim Defense Industries MDX 508 U.R.G. AR-15 7.62x39mm 8.5 inc… $1,092.29at OpticsPlanet
- Maxim Defense Industries PDX U.R.G. Mil-Spec Upper Receiver 7.6… $915.39at MidwayUSA
- Primary Weapons Systems MK111 MOD 2-M Upper Receiver 7.62x39 20… $1,329.95at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $1,615.50Salechecked 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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This part is out of stock at every store we track. These similar upper receivers are in stock, with today's prices.
Maxim Defense Industries PDX U.R.G. Mil-Spec Upper Receiver 7.62x39 Hate Brake 5/8-24 Thread 5.5in Barrel Black
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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 | $1,615.50 | $1,615.50 | $1,615.50 |
Since Oct 15, 2026.
About this part
The Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit 7.62x39 14in Hate Brake 5/8-24 Thread 5.5in Barrel Type III Hardcoat Anodized Black is a 14" 7.62x39 upper receiver from Maxim Defense. One store lists it, OpticsPlanet at $1,615.50.
Fits and works with
- Caliber
- 7.62x39 · Shop matching ammo
- Bolt
- 7.62x39 · Bolt carrier groups
- Muzzle thread
- 5/8x24 · Muzzle devices
- Barrel length
- 14" · Handguards
Specifications
- Manufacturer
- Maxim Defense
- Color
- Black
- Platform
- AR-15
- Caliber
- 7.62x39
From the manufacturer
Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit 7.62x39 14in Hate Brake 5/8-24 Thread 5.5in Barrel Type III Hardcoat Anodized Black. 75 inches with the stock collapsed. These AR15 Upper Receivers are a cut above what you get anywhere else. The Maxim SCW system of the PDX Brace Upper Kit cuts down the stock length to 4 . Interchangeable buffer weights give you maximum performance and versatility without sacrificing form and functionality. If you're looking for a quality build for your AR15 you want to get the Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit. Specifications for Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit: Manufacturer: Maxim Defense Industries Gun Type: Rifle Overall Length: 14 in Barrel Length: 5.5 in Weight: 5 lb Stock/Brace Material: 6AL-4V Titanium 17-4 Stainless Steel 6061 Aluminum 7075 Aluminum Handguard Type: Free-Float Muzzle Device: Hatebrake Finish: Type III Hardcoat Anodized Additional Features: PDX/SCW Compatible Gun Rail: Picatinny Gun Make: AR Platform Gun Model: AR-15 Magazine Included: No Country of Origin: USA Features of Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit FEATURES: HATEBRAKE installed under the handguard M-slot compatible handguard Military grade materials 6Al-4V Titanium 17-4 Stainless Steel 7075 and 6061 Aluminum SCW Buffer-carrier HK height rail for a more rigid upper receiver Military tested Rapid Deploying PDW stock FUNCTIONS: Optimized Personal Defense Weapon kit Increased reliability due to included HATEBRAKE Optimized low flash Designed to be installed on any Mil-Spec lower receiver Package Contents: Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit Package Contents: Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit HATEBRAKE installed under handguard 1-2 MOA accurate M-slot compatible handguard Military grade materials 6Al-4V Titanium 17-4 Stainless Steel 7075 and 6061 Aluminum SCW Buffer-carrier HK height rail for a more rigid upper receiver Military tested Rapid Deploying PDW brace. What firearm models does the manufacturer say Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit is compatible with? The manufacturer says that Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit is compatible with AR-15Maxim Defense Industries MXM-47815: MDX 505 PDX SCW PDW Brace Upper Kit 7.62x39 14in Hate Brake 5/8-24 Thread 5.5in Barrel Type III Hardcoat Anodized Black
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