The K also features an updated M-Lok handguard which is available as accessories in multiple lengths for suppressor coverage.
Finally, the K is upgraded with the ultra smooth, ultra-fast Timney Trigger. If you are looking for the ultimate modular sub gun, look no further than the MPX K from SIG SAUER.
Caliber 9mm Luger
Model MPX K
Stock Finish Black
Action Semi-Automatic
Barrel Length Range 4.00″ to 4.99″
Sights None, Optic Ready
Capacity 35+1
Muzzle Threaded
Grips Black Polymer
Metal Finish Black Hardcoat Anodized
OAL 22.5″
Receiver Material Aluminum
Stock Description PCB Folding- folds left side
Stock Material Synthetic
Thread Pattern M13.5 x 1 mm
Trigger Timney
Twist 1:10″
Weight 5 lbs
Barrel Description Cold Hammer-Forged Carbon Steel
Search Code SIGMPX
Similar Items HGT9MM
Barrel Length 4.5″
FFL Transfer & Firearms Laws for Sig MPX K Pistol 9mm, 4.5" Barrel, Folding Brace, Black, 35rd Sig Sauer
All firearms, including the Sig MPX K Pistol 9mm, 4.5" Barrel, Folding Brace, Black, 35rd Sig Sauer, 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 Sig MPX K Pistol 9mm, 4.5" Barrel, Folding Brace, Black, 35rd Sig Sauer 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 Sig MPX K Pistol 9mm, 4.5" Barrel, Folding Brace, Black, 35rd Sig Sauer 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 Sig MPX K Pistol 9mm, 4.5" Barrel, Folding Brace, Black, 35rd Sig Sauer?
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 Sig MPX K Pistol 9mm, 4.5" Barrel, Folding Brace, Black, 35rd Sig Sauer 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: RIFLES, Sig Sauer.
What tags or features does this product have?
Key features and tags for this product include: Guns.
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.
| Classification | Firearm |
|---|---|
| Manufacturer Number | PMPX-4B-9-35 |
| Brand | Sig Sauer |
| interest | AR-15 Pistols, Sig AR Pistols, Handguns Sale |
FFL Transfer & Firearms Laws
All firearms, including the Sig MPX K Pistol 9mm, 4.5" Barrel, Folding Brace, Black, 35rd Sig Sauer, 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 Sig MPX K Pistol 9mm, 4.5" Barrel, Folding Brace, Black, 35rd Sig Sauer 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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