Maxim Defense Industries MDX 510 U.R.G. AR-15 5.56x45mm NATO 10.3 inch Upper Receiver Pistol Length 1-7 Twist 1/2x28 HATEBRAKE Arid
$1,255.50 at MidwayUSA · 2 stores
In stock
Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit 5.56 NATO 14in Hate Brake 1/2-28 Thread 5.5in Barrel Type III Hardcoat Anodized Black
Maxim Defense · Upper Receiver
No ratings yetBest price
$1,615.50at OpticsPlanet
In stock Sale checked Oct 13, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $1,615.50Salechecked 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: $1,615.50 at OpticsPlanet. Dashed line = out of stock. Tracking since Oct 12, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| OpticsPlanet | $1,615.50 | $1,615.50 | $1,615.50 |
Since Oct 12, 2026.
About this part
The Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit 5.56 NATO 14in Hate Brake 1/2-28 Thread 5.5in Barrel Type III Hardcoat Anodized Black is a 14" 5.56 / .223 upper receiver from Maxim Defense. One store lists it, OpticsPlanet at $1,615.50. The lowest in-stock price in the last 30 days was $1,615.50 at OpticsPlanet.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 14" · Handguards
Specifications
- Manufacturer
- Maxim Defense
- Color
- Black
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit 5.56 NATO 14in Hate Brake 1/2-28 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-47817: MDX 505 PDX SCW PDW Brace Upper Kit 5.56 NATO 14in Hate Brake 1/2-28 Thread 5.5in Barrel Type III Hardcoat Anodized Black
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