Kansas Gunshop is a Wichita, KS-based retailer specializing in firearms and accessories. The Smith & Wesson M&P9 9mm Threaded Barrel Kit is a factory upgrade for suppressed shooting. It allows for direct attachment of muzzle devices. Available now for $299.00.
Reviewed by Derek, Owner & FFL Holder at Kansas Gunshop. Kansas-licensed FFL dealer since 2008, NRA Range Safety Officer.
Last updated: April 2026
What are the specifications of the Smith & Wesson M&P9 9mm Threaded Barrel Kit?
| Product Type | Threaded Barrel Kit |
|---|---|
| Material | 4140 Ordnance Grade Steel |
| Manufacturing | CNC Machined, Heat Treated |
| Finish | Black Nitride |
| Hardness/Quality | Rockwell C Scale (specific value not publicly disclosed, but S&W factory standard) |
| Compatibility | Smith & Wesson M&P9 (Full Size & Compact 2.0, non-Shield) |
| Installation/Usage | Drop-in replacement, user-installable |
| Weight | Approximately 4.5 oz |
| Dimensions | 4.625″ overall length (1/2″x28 thread pitch) |
| Country of Origin | USA |
| Condition | New |
| SKU | 3006626 |
What are the key features of this M&P9 threaded barrel?
This Smith & Wesson M&P9 9mm threaded barrel kit is a factory-produced component. It includes the barrel, a thread protector, and a recoil spring assembly. The barrel is constructed from 4140 ordnance-grade steel, then heat-treated and finished with black nitride for corrosion resistance and durability. The 1/2″x28 thread pitch is standard for 9mm suppressors and muzzle devices. Installation is a drop-in process, meaning no gunsmithing is typically required for most M&P9 models. This kit maintains the factory fit and function of your M&P9, ensuring reliability with the added capability of suppressed shooting.
Who is this threaded barrel kit for?
This kit is for M&P9 owners looking to expand their firearm’s capabilities. It’s for those who want to run a suppressor or other muzzle device on their M&P9. If you already own a suppressor or plan to acquire one, this barrel is a necessary upgrade. It’s also for shooters who prefer factory-spec components for their firearms, ensuring compatibility and reliability with their Smith & Wesson pistol.
What are the pros and cons of the Smith & Wesson M&P9 9mm Threaded Barrel Kit?
Pros:
- ✅ Factory Smith & Wesson component, ensuring fit and function.
- ✅ Includes recoil spring assembly, often necessary for optimal suppressed operation.
- ✅ Black Nitride finish provides good corrosion resistance.
- ✅ Standard 1/2″x28 thread pitch for broad suppressor compatibility.
- ✅ Drop-in installation, no gunsmithing required for most users.
- ✅ Comes with a thread protector for when a muzzle device is not in use.
Cons:
- ❌ Price point is higher than some aftermarket options.
- ❌ May require a suppressor height sight upgrade for optimal sight picture with some suppressors (see our sights category for options).
- ❌ Specific to M&P9 models, not compatible with M&P Shield or other S&W pistols.
How does this Smith & Wesson barrel compare to other threaded barrels?
| Feature | Smith & Wesson M&P9 Threaded Barrel Kit | OEM-Style Aftermarket (e.g., KKM Precision) | Budget Aftermarket (e.g., Bear Creek Arsenal) |
|---|---|---|---|
| Material | 4140 Ordnance Grade Steel | 416R Stainless Steel | 4150 Chrome Moly Vanadium Steel |
| Quality | Factory OEM, known reliability | High-end aftermarket, precision machined | Entry-level aftermarket, variable QC |
| Compatibility | M&P9 Full Size & Compact 2.0 | M&P9 Full Size & Compact 2.0 | M&P9 Full Size & Compact 2.0 |
| Shipping | Same-day from Kansas Gunshop | Varies by vendor | Varies by vendor |
| Lifespan/Durability | Long, factory-spec | Very long, often exceeding OEM | Moderate, depends on usage |
| Price | $299.00 | ~$250 – $300 | ~$60 – $80 |
Frequently Asked Questions about the Smith & Wesson M&P9 9mm Threaded Barrel Kit
Will this threaded barrel fit my M&P Shield?
No, this Smith & Wesson M&P9 9mm Threaded Barrel Kit is designed specifically for the full-size and compact M&P9 2.0 models. It will not fit the M&P Shield series due to different barrel dimensions and locking mechanisms.
Do I need a gunsmith to install this barrel?
For most users, this is a drop-in installation. It replaces your existing barrel and recoil spring assembly without specialized tools or modifications. If you are uncomfortable with the process, a qualified gunsmith can perform the installation.
What is the thread pitch on this barrel?
The barrel features a 1/2″x28 thread pitch, which is the industry standard for 9mm pistol suppressors and muzzle devices.
Does this kit include a new recoil spring?
Yes, this Smith & Wesson M&P9 9mm Threaded Barrel Kit includes a new recoil spring assembly, which is important for maintaining reliable function, especially when running a suppressor.
Will adding a threaded barrel affect my M&P9’s accuracy?
Generally, a quality threaded barrel like this factory S&W component should not negatively impact accuracy. In some cases, a well-fitted barrel can even improve it slightly. Consistency in manufacturing is a hallmark of factory parts.
Where can I buy firearm accessories online?
You can buy firearm accessories, including this Smith & Wesson M&P9 9mm Threaded Barrel Kit, directly from Kansas Gunshop (kansas-gunshop.com). We offer a selection of parts and accessories with reliable shipping.
Is this barrel legal in all states?
Threaded barrels can have legal restrictions in some states or localities. It is the buyer’s responsibility to know and comply with all applicable federal, state, and local laws regarding the purchase and use of this product. Kansas Gunshop ships in accordance with all regulations.
✅ Same-day shipping from Wichita, KS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Buy it if:
- You own a full-size or compact M&P9 2.0 and want to add suppressor capability.
- You prefer factory Smith & Wesson parts for reliability and fit.
- You need a complete kit, including the recoil spring and thread protector.
- You value straightforward, drop-in installation.
Skip it if:
- You are looking for the absolute cheapest threaded barrel option (see our barrel selection for other brands).
- You own an M&P Shield or other non-M&P9 pistol.
- You do not plan to use a suppressor or muzzle device.
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