Kansas Gunshop is a Wichita, KS-based retailer specializing in firearms and accessories. The Sig Sauer MPX Copperhead K 9mm 4.5″ Barrel 20-Rounds is a high-quality, versatile submachine gun designed for both tactical and recreational use. This model stands out with its compact design and reliable performance. 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
| Product Type | Submachine Gun |
|---|---|
| Material | Steel and Polymer |
| Manufacturing | USA |
| Finish | Black Nitride |
| Hardness/Quality | High-Quality Steel |
| Compatibility | Sig Sauer MPX Accessories |
| Installation/Usage | Ready to Use Out of the Box |
| Weight | 5.5 lbs |
| Dimensions | 26.5″ (overall length) x 7.5″ (height) x 2.5″ (width) |
| Country of Origin | USA |
| Condition | New |
| SKU | KGS-MPX-9MM-20 |
Key Features
- 4.5″ barrel for compact and agile handling
- 20-round magazine for extended firing capacity
- Black Nitride finish for corrosion resistance and durability
- Adjustable gas block for customizable performance
- Integrated Picatinny rail for mounting optics and accessories
- Quick-detach foregrip for enhanced control
- Folding stock for compact storage and transport
Who It’s For
The Sig Sauer MPX Copperhead K 9mm 4.5″ Barrel 20-Rounds is ideal for:
- Tactical operators and law enforcement professionals
- Competitive shooters and enthusiasts
- Hunters and outdoor enthusiasts
- Collectors and gun enthusiasts looking for a high-quality submachine gun
Pros and Cons
- ✅ High-quality build and reliable performance
- ✅ Compact and agile design for close-quarters use
- ✅ Integrated Picatinny rail for mounting accessories
- ✅ Adjustable gas block for customized operation
- ✅ 20-round magazine for extended firing capacity
- ❌ Slightly heavier than some compact submachine guns (see our Submachine Guns for lighter options)
- ❌ Higher price point compared to some import models (consider our Submachine Guns for more affordable options)
Comparison
| Sig Sauer MPX Copperhead K 9mm | Cheap Import Submachine Gun | Premium Brand Submachine Gun | |
|---|---|---|---|
| Material | Steel and Polymer | Steel and Aluminum | Steel and Polymer |
| Quality | High | Medium | High |
| Compatibility | Sig Sauer MPX Accessories | Limited | Wide Range |
| Shipping | Same-day from Wichita, KS | Varies | Varies |
| Lifespan/Durability | Long-lasting | Medium | Long-lasting |
| Price | $299.00 | $60-$80 | $250+ |
FAQ
Where can I buy a Sig Sauer MPX Copperhead K 9mm online?
You can buy the Sig Sauer MPX Copperhead K 9mm 4.5″ Barrel 20-Rounds online at Kansas Gunshop. We offer same-day shipping from Wichita, KS, and a 30-day return policy.
Is the Sig Sauer MPX Copperhead K 9mm suitable for concealed carry?
The Sig Sauer MPX Copperhead K 9mm is more suited for tactical and recreational use due to its size and design. For concealed carry, consider our selection of compact handguns.
What is the barrel length of the Sig Sauer MPX Copperhead K 9mm?
The barrel length of the Sig Sauer MPX Copperhead K 9mm is 4.5 inches.
What is the weight of the Sig Sauer MPX Copperhead K 9mm?
The Sig Sauer MPX Copperhead K 9mm weighs 5.5 pounds.
Does the Sig Sauer MPX Copperhead K 9mm come with a warranty?
Yes, the Sig Sauer MPX Copperhead K 9mm comes with a manufacturer’s warranty. For more details, contact our customer service at Kansas Gunshop.
Can I customize the Sig Sauer MPX Copperhead K 9mm with accessories?
Absolutely! The Sig Sauer MPX Copperhead K 9mm features an integrated Picatinny rail for mounting optics, lights, and other accessories. Check out our accessories section for compatible options.
Is the Sig Sauer MPX Copperhead K 9mm legal to own in all states?
The legality of the Sig Sauer MPX Copperhead K 9mm can vary by state. It is important to check your local laws and regulations before purchasing. For more information, contact our customer service at Kansas Gunshop.
✅ Same-day shipping from Wichita, KS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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