The Maxim PDX 762×39 5.5″ 20R Arid Brace is a purpose-built PDW for close-quarters work. It’s a factory SBR-level package that comes ready to run, chambered in 7.62×39 with a 5.5-inch barrel, a fixed Arid Cerakote finish, and the patented SCW brace system. This is a gun that disappears in a truck cab, slips through narrow doorways, and hits hard with a cartridge that punches above its weight class. If you need a tool that goes where a full-size rifle can’t, this is it.
| Manufacturer | Maxim Defense |
|---|---|
| Model | PDX |
| Material | 7075-T6 aluminum upper and lower receiver, steel barrel (per manufacturer specs) |
| Compatibility | 7.62x39mm ammunition, standard AR-15 lower parts (SCW buffer system proprietary) |
| Finish | Arid Cerakote |
| Weight | 5.2 lbs (as configured with brace and empty magazine, per manufacturer specs) |
| Condition | New |
Key Features
- Patented SCW Brace System – The 4-inch brace integrates the bolt carrier and buffer to keep the overall length at 18.75 inches. This means you get a compact PDW that cycles reliably without sacrificing recoil control.
- Maxim HATEBRAKE Muzzle Booster – Mounted under the handguard, this device redirects blast forward and reduces felt recoil. It cuts flash signature and keeps the muzzle down for faster follow-up shots in tight spaces.
- 5.5-Inch Chrome-Lined Barrel – Chrome lining extends barrel life and resists corrosion. The short length keeps the package compact while still stabilizing 7.62×39 rounds for effective CQB use.
- 20-Round Magazine – The included 20-round mag balances capacity with concealability. It’s enough for most engagements without sticking out too far from the grip.
- Arid Cerakote Finish – This dry, matte coating reduces glare and holds up to hard use. It resists scratches, solvents, and weather better than standard anodizing.
Who It’s For
This PDX is built for ranchers, rural workers, and anyone who needs a compact rifle that rides in a vehicle or hangs on a pack. It’s for the guy who works fence lines in rough country and wants a gun that fits in a truck console or behind a seat. If you’re running property security, checking remote water tanks, or patrolling a large spread, this gun gives you rifle power in a package that doesn’t get in the way.
Pros & Cons
- Pro: Short overall length (18.75 inches) makes it one of the most compact 7.62×39 PDWs on the market.
- Pro: SCW system reduces recoil and improves reliability across different loads.
- Pro: Arid Cerakote blends into dry environments and resists wear.
- Con: The proprietary SCW buffer system means you can’t swap in standard AR-15 buffers or stocks without replacing the whole assembly.
Comparison
| Feature | Maxim PDX 7.62×39 | Zev Technologies OZ9C | Geissele Super Duty 11.5″ |
|---|---|---|---|
| Caliber | 7.62×39 | 9mm | 5.56 NATO |
| Barrel Length | 5.5″ | 4.5″ | 11.5″ |
| Overall Length | 18.75″ | 7.6″ (pistol) | 29.5″ (stock extended) |
| Weight | 5.2 lbs | 1.9 lbs | 6.1 lbs |
| Brace System | Maxim SCW | None (pistol) | Standard carbine buffer |
| Use Case | Vehicle/confined CQB | Concealed carry | General purpose rifle |
FAQ
What is the overall length of the Maxim PDX 762×39 5.5″ 20R Arid Brace?
The overall length is 18.75 inches with the SCW brace collapsed. That makes it shorter than many bullpups and small enough to stow in a backpack or vehicle console.
Does the Maxim PDX come with a muzzle device?
Yes. It ships with the Maxim HATEBRAKE muzzle booster installed under the handguard. This device reduces recoil, cuts flash, and redirects blast forward to keep the shooter’s sight picture clear.
Can I use standard AR-15 magazines with this PDX?
No. The 7.62×39 version uses proprietary Maxim magazines designed for the SCW system. The included 20-round magazine is optimized for reliable feeding with this caliber and bolt carrier.
Is the SCW brace adjustable for length of pull?
The brace itself is fixed at 4 inches, but the SCW system uses interchangeable buffer weights to tune recoil impulse. You can swap weights to match different ammunition loads without changing the brace length.
What is the warranty on the Maxim PDX?
Maxim Defense covers the PDX with a limited lifetime warranty on the receiver and barrel, with a one-year warranty on the SCW brace assembly. Contact Maxim directly for specific claim procedures.
Trust & Delivery
- ✅ Nationwide delivery (all 50 states)
- ✅ Ships 1-2 business days
- ✅ 30-day returns
- ✅ Secure checkout
Last updated: April 2026
See more in our AR Pistols or PDW categories. Also check Maxim Defense.
FFL Transfer & Firearms Laws for MAXIM PDX 762X39 5.5″ 20R ARID BRACE
All firearms, including the MAXIM PDX 762X39 5.5″ 20R ARID BRACE, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the MAXIM PDX 762X39 5.5″ 20R ARID BRACE is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
Frequently Asked Questions About This Product
Why buy MAXIM PDX 762X39 5.5″ 20R ARID BRACE from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy MAXIM PDX 762X39 5.5″ 20R ARID BRACE?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is MAXIM PDX 762X39 5.5″ 20R ARID BRACE available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: AR Pistols.
What tags or features does this product have?
Key features and tags for this product include: .
Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
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FFL Transfer & Firearms Laws
All firearms, including the MAXIM PDX 762X39 5.5″ 20R ARID BRACE, must be shipped to a licensed Federal Firearms License (FFL) dealer. A background check and any required local paperwork must be completed before you can take possession.
How It Works
- Place your order online.
- Send us your preferred local FFL dealer info.
- We ship the firearm to your FFL after verification.
- Complete background check and pick up from your dealer.
Legal Compliance
We comply with all U.S. firearm laws. It is your responsibility to ensure the MAXIM PDX 762X39 5.5″ 20R ARID BRACE is legal in your state. Some states (e.g. CA, NY, NJ) have restrictions on magazine size or certain features.
Helpful Links
Need help? Contact our team — we’ll guide you through selecting a compliant firearm and the FFL transfer process.
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