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Original price was: $2,495.00.Current price is: $2,245.50.

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🚚 Not on our shelf today — order now to reserve yours, or call (817) 393-4000 for a current lead time. Free local pickup in Roanoke, TX when it arrives.
MPN
MXM-47825
UPC
680017478254
Caliber
.300 Blackout
Barrel
5.5"
Capacity
20
Action
AR Platform, Semi-Auto
Product Code: MXM-47825 Categories: , Brand:

Maxim Defense PDX SBR .300 BLK 5.5″ black 18.75″ NFA SOCOM PDW. $0 stamp. Western Sport TX.

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Product Description

⚠ NFA ITEM — SHORT BARREL RIFLE (SBR)
Federally regulated SBR under the National Firearms Act. BATFE Form 4, background check, $200 NFA tax stamp now $0 under OBBBA. Buyer must be 21+, US citizen, NFA-legal state. Allow 30–90 days. Western Sport handles all paperwork — call 817-393-4000.

Maxim Defense PDX SBR — .300 BLK 5.5" — Black

The Maxim Defense PDX .300 BLK Black is the RECOIL Magazine “Best of SHOT 2019” PDX SBR in .300 BLK — the SOCOM PDW solicitation platform optimized for suppressed use. .300 BLK with a 5.5" barrel delivers excellent terminal performance both supersonic and subsonic. Add a can to the HATEBRAKE™ for hearing-safe suppressed operation. 18.75" overall. 5 lbs 11 oz. SCW™ stock. Black finish. Made in USA. ISO 9001:2015.

Spec Detail
Caliber .300 BLK
Barrel Length 5.5"
Thread Pitch 5/8×24
Weight 5 lbs 11 oz
Overall Length 18.75"
Muzzle Device HATEBRAKE™ muzzle booster
Stock Maxim SCW™
Materials 6Al-4V titanium + 17-4 stainless steel + 7075 & 6061 aluminum
Finish Hard anodizing
Color Black
Accolades Best of SHOT 2019 — RECOIL Magazine
NFA Class Short Barrel Rifle — Form 4, $0 stamp (OBBBA)

Maxim Defense Industries: Purpose-Designed, Duty-Built

Maxim Defense Industries is a Minnesota-based American firearm manufacturer and ISO 9001:2015 certified company. The PDX and SDX platforms were developed directly from the SOCOM PDW solicitation — designed to meet the demands of Tier 1 operators who need maximum lethality in a minimum package. Maxim Defense builds its firearms from military-grade materials: 6Al-4V titanium, 17-4 stainless steel, 7075-T6 and 6061 aluminum. Every firearm is built to order in the USA.

Frequently Asked Questions

What is an SBR? A Short Barrel Rifle has a rifle barrel under 16″ and is federally regulated as an NFA item. It requires a BATFE Form 4 transfer, background check, and $200 tax stamp — now $0 under OBBBA.

What calibers does the Maxim Defense PDX/SDX fire? All PDX and SDX models are offered in 5.56 NATO, 7.62×39, and .300 BLK. .300 BLK pairs best with an integral suppressor for hearing-safe suppressed fire.

Does the SDX/PDX-SD come with the suppressor? Yes — the integrated DSX-D (SDX) or PDX-specific suppressor is included. The suppressor is part of the registered SBR and is not sold separately.

How long does NFA approval take? Typically 30–90 days. Western Sport handles all Form 4 paperwork in-house. Call 817-393-4000.

Is the $0 NFA tax stamp permanent? The OBBBA eliminated the $200 NFA tax. Western Sport recommends calling to confirm current status.

Why Buy From Western Sport?

Western Sport is a licensed FFL/SOT dealer in Roanoke, Texas (North Texas), FFL/SOT since 2007. We specialize in NFA transfers and handle all BATFE Form 4 paperwork in-house — so you get a smooth, guided NFA purchase experience. The $0 NFA tax stamp under OBBBA makes now the best time to buy. Call 817-393-4000 with questions.

Additional information

Weight 9.125 lbs
Brand Maxim Defense Industries
Caliber

Finish

Barrel Length

Capacity

Action Type

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