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Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit Up to 14% Off and Blazin' Deal w/ Free S&H — 6 models

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, MXM-47815
Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit, 300 BLK, 14in, Hate Brake, 5/8-24 Thread, 5.5in Barrel, Type III Hardcoat Anodized, Arid Earth, MXM-47828
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
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, MXM-47815
1 of 10 images
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, MXM-47815
Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit, 300 BLK, 14in, Hate Brake, 5/8-24 Thread, 5.5in Barrel, Type III Hardcoat Anodized, Arid Earth, MXM-47828
2 of 10 images
Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit, 300 BLK, 14in, Hate Brake, 5/8-24 Thread, 5.5in Barrel, Type III Hardcoat Anodized, Arid Earth, MXM-47828
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, Arid Earth, MXM-47814
3 of 10 images
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
4 of 10 images
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
5 of 10 images
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
6 of 10 images
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
7 of 10 images
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
8 of 10 images
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
9 of 10 images
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, Arid Earth, MXM-47814
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, Arid Earth, MXM-47814
10 of 10 images
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, Arid Earth, MXM-47814

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Questions & Answers
This product shows a picture of a reptilia ar grip. Is the reptilia ar grip included? because the product package contents do not state that it does. Expert Answer

No, it will not include the handstop.

by Armando R., Gear Expert, December 12, 2020
See 2 More Answers
does it come with a trigger for the lower or do I need to get one. I'd so what is recommended. Expert Answer

You would need to get a trigger separately as well as a majority of the lower receiver and its parts. The trigger recommendation is dependent on your budget and what features you want. Please email us at techsales@opticsplanet.com with a price range and any preferences and we can look into trigger options.

by Armando R., Gear Expert, December 12, 2020
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
A pocket rocket by REDACTED, January 17, 2026
I picked up this Maxim Industries PDX kit after watching a review from Short Shot Tony on YouTube about the now discontinued Springfield armory PDW Saint. That Saint was made with the Maxim Industries PDX kit, and after trying to find one, I decided ...
Read More...
1/1 found this helpful
Helpful Positive Review
Everyone needs at least one of these! by Jay, Verified Owner, November 11, 2020
This little setup is absolutely awesome! Excellent quality and super easy to put together! I picked up the 5.56 version and now going to grab the 7.62 also. As my title for this review says... I believe everyone should own at least one!
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Helpful Positive Review
Maxim Defense upper kit by Ben, January 8, 2022
Great quality product. Very robust. Love that it comes with a grip and legit Radian LT charging handle. I used a radian lower also in FDE and it looks perfect. Only minor complaint is the stock slide when fully collapsed interferes with the bolt cat...
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Great piece of hardware by Jake, Verified Owner, October 7, 2022
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Maxim defense pdx absolutely cool piece by Cactus Daddy 623, Verified Owner, August 4, 2021
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ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

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Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit

The Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit The buffer system/bolt assembly allows this AR pistol to be 18.75 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.image

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-15

Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit Orderable Models

List of Orderable Models

  • 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, MXM-47815 , MPN: MXM-47815 , UPC: 680017478155 , Code: MDI-URC-GHGFKIT-MXM-47815
  • Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit, 300 BLK, 14in, Hate Brake, 5/8-24 Thread, 5.5in Barrel, Type III Hardcoat Anodized, Arid Earth, MXM-47828 , MPN: MXM-47828 , UPC: 680017478285 , Code: MDI-URC-GHGFKIT-MXM-47828
  • Maxim Defense Industries MDX 505 PDX SCW PDW Brace Upper Kit, 300 BLK, 14in, Hate Brake, 5/8-24 Thread, 5.5in Barrel, Type III Hardcoat Anodized, Black, MXM-47829 , MPN: MXM-47829 , UPC: 680017478292 , Code: MDI-URC-GHGFKIT-MXM-47829
  • 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, MXM-47817 , MPN: MXM-47817 , UPC: 680017478179 , Code: MDI-URC-GHGFKIT-MXM-47817
  • 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, Arid Earth, MXM-47814 , MPN: MXM-47814 , UPC: 680017478148 , Code: MDI-URC-GHGFKIT-MXM-47814
  • 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, Arid Earth, MXM-47816 , MPN: MXM-47816 , UPC: 680017478162 , Code: MDI-URC-GHGFKIT-MXM-47816
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Last updated 2026-09-16 UTC.