Freedom Ordnance FX-9 FX9P4-S 9mm 4-inch Pistol SBA3
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Expert review
About this product
The Freedom Ordnance FX-9 FX9P4-S is a factory-configured 9mm AR-platform pistol built for rapid deployment from confined spaces and adaptable range use. It arrives ready-to-fire with a 4-inch barrel, an integral faux suppressor shroud, and an SB Tactical SBA3 pistol brace installed. This configuration prioritizes a compact 18.5-inch overall length and a 4.45-pound unloaded weight, making it one of the shortest, ready-to-brace AR-platform 9mm pistols on the market.
What is the Freedom Ordnance FX-9 used for?
The FX-9 is engineered for compact defensive applications and versatile range training, specifically where maneuverability is paramount. Its 4-inch barrel and 18.5-inch overall length allow it to be deployed effectively from vehicle interiors or within hallways, while the 9mm chambering keeps ammunition costs manageable for high-volume drills. The optic-ready upper receiver and familiar AR-15 controls make it an excellent transition trainer for users whose primary platform is a 5.56 rifle.
How does the FX-9 compare to the CZ Scorpion EVO 3 S1 Pistol?
The FX-9 offers superior parts commonality and manual-of-arms familiarity for existing AR-15 owners, while the CZ Scorpion EVO 3 S1 typically provides better out-of-the-box trigger feel. The Scorpion uses a proprietary, largely polymer design with a distinct safety selector, whereas the FX-9 accepts nearly any mil-spec AR-15 fire control group, grip, and safety selector. For an AR-centric shooter who values platform standardization over a dedicated PCC design, the FX-9 is the more logical and cost-effective choice.
What does it weigh and what are the dimensions?
This pistol weighs 4.45 pounds (2.02 kg) unloaded and measures 18.5 inches in overall length with the included brace collapsed. The 4-inch barrel is shrouded by a non-functional faux suppressor that adds approximately 6 inches to the visual profile without increasing the NFA-regulated barrel length. The receiver is milled from 6061-T6 aluminum and finished in a hard coat anodize that achieves a surface hardness of approximately 60 on the Rockwell B scale.
Who is this NOT for?
This is not a suitable first firearm for a novice shooter unfamiliar with the legal intricacies surrounding pistol braces and the potential for configuration changes. Individuals seeking maximum 9mm ballistics should look at carbines with 16-inch barrels, as the 4-inch barrel here sacrifices roughly 150-200 feet per second in velocity compared to a full-length barrel. It's also a poor choice for collectors who prize traditional wood and steel aesthetics over modern polymer and aluminum function.
What's in the box?
The factory package includes the complete FX-9 pistol with the SBA3 brace installed, one 17-round Glock-pattern magazine, a simple owner's manual, and a chamber flag. Unlike some competitors, it does not include a case, a sling, or any tools for adjusting the brace's tension on the buffer tube. You will need to source your own optic, a mounting solution, and additional magazines, which are widely available as standard Glock 17/19 magazines.
Is the Freedom Ordnance FX-9 worth it at $701.99?
At just over seven hundred dollars, the FX-9 represents strong value for a shooter who wants a configured, reliable AR-9 platform without piecing together a lower, upper, and brace separately. The inclusion of the SBA3 brace, a ~$120 component if bought alone, significantly offsets the initial cost. When you factor in the savings on a compatible lower parts kit and the hours saved on assembly and headspacing checks, this factory-built option is cost-effective for its intended role, especially compared to building a similar firearm from disparate components.
Specs at a glance
Pros & cons
What works
- Factory-configured with SBA3 brace – saves ~$120 and assembly time vs. building
- Weighs 4.45 lbs unloaded – nearly 1 lb lighter than many billet AR-9 builds
- Optic-ready upper with a 3.25-inch Picatinny rail section – direct mount for most micro red dots
- Uses ubiquitous Glock magazines – compatibility with the most common 9mm pistol mags available
Trade-offs
- Faux suppressor is non-functional – adds 6 inches of length without ballistic benefit
- No iron sights included – requires immediate additional investment for an optic or BUIS
- Proprietary bolt and buffer system – limits aftermarket upgrade options compared to mil-spec AR-15 parts
Key attributes
| upc | 856169007363 |
| manufacturer | Freedom Ordnance |
| manufacturer part number | FX9P4-S |
| action | Semi-Auto |
| barrel length | 4" |
| caliber/gauge | 9mm |
| capacity | 31 + 1 |
| color | Black |
| model | FX9 |
| product type | AR |
| safety | AR-15 Configured Selector |
| shipping weight | 6.2 |
| sights | Optic Ready |
Frequently asked questions
- Is it compatible with standard AR-15 parts?
- The lower receiver accepts standard mil-spec AR-15 fire control groups, pistol grips, and safety selectors. However, the upper receiver, bolt carrier group, and magazine well are proprietary 9mm designs. It uses Glock-pattern magazines, not standard AR-15 mags.
- Does this work with a suppressor?
- Yes, the 4-inch barrel is threaded 1/2"-28 under the removable faux suppressor shroud, allowing direct attachment of most 9mm suppressors. You must first unscrew and remove the faux suppressor, which requires an armorer's wrench or a strap wrench and takes about 2 minutes.
- Can I replace the SBA3 pistol brace?
- Yes, the brace is attached to a standard mil-spec carbine buffer tube. You can swap it for any other pistol brace or, if you file a Form 1 with the ATF and receive approval, replace it with a rifle stock. The buffer system itself is proprietary to the FX-9's blowback operation.
- How many rounds does the included magazine hold?
- It ships with one OEM 17-round Glock-pattern magazine. The magazine well accepts any double-stack 9mm Glock magazine, including common 15, 17, 19, 24, and 33-round models from brands like Glock, Magpul, and ETS.
- Does Ironclad Armory offer financing?
- Yes, we offer financing through our partner, Credova. Approval decisions are typically provided within 60 seconds of application. Specific terms, including APR and payment periods, depend on the buyer's creditworthiness at the time of application.