SIG MPX K 4.5" 9mm Pistol (mil/le only)

The groundbreaking MPX sub gun redesigned for 2019

  • Aluminum M-LOK Handguard
  • Sig Sauer OEM Factory Flip Up Sights
  • Please note:  The Sig Sauer Armed Professional Program models of this firearm do not come with the PCB Brace, they do however come with flip-up sights.

Retail: $2,162.00
Price: $1,393.00
You Save: $769.00 (35.6%)

Back Ordered

Manufacturer LE/Mil Program Pricing - Purchaser Must Provide Proof of Eligibility. Please see Eligibility Information tab for Eligibility Requirements.



The choice of professionals worldwide, the MPX K offers a closed bolt gas piston system that is ultra reliable and durable. As with all MPX, the K is modular allowing for multiple handguard and barrel lengths and is ready to go for suppressor use. For 2019, the K features an updated M-Lok handguard which is available as accessories in multiple lengths for suppressor coverage.  If you are looking for the ultimate modular sub gun, look no further than the MPX K from SIG SAUER.

Order Details

  • Not available where prohibited by law
  • Proof of eligibility is required and we will keep a copy of the eligibility on file.
  • Offer not available in all states
  • All web sales must go through a Federal Firearms Licensee
  • Your order confirmation will contain information on how to submit your qualification credentials and FFL's information
  • Coupon codes/Discount codes not applicable
  • Please check out the Individual Firearms Sales page for more details on the ordering process.



CALIBER:  9mm Luger

OVERALL LENGTH:  22.25 in (565 mm)

OVERALL WIDTH:  2.4 in (61 mm)

HEIGHT:  8 in (203 mm)

BARREL LENGTH:  4.5 in (114 mm)

WEIGHT:  5 lb (2.3 kg)



We are proud to participate in SIG Sauer's Law Enforcement / Military Discount Program which offers many popular SIG weapons at significant discounts to eligible customers. Eligible customers are:

  • Military: Active, Reserve, NG, Retired, Medically Retired, and Service-connected Disabled Veterans
  • Law Enforcement: Federal, State, and Local Active or Retired Sworn Officers
  • Corrections Officers including Parole and Probation Officers
  • 1st Responders: Firefighters, Paramedics, and EMT's
  • Licensed Federal, State, City and Private Security Officers
  • Commercial Pilots and Federal Flight Deck Officers
  • Court Judges
  • District and Deputy District Attorneys
  • NRA Certified Firearms Instructors with current certificate of training

You MUST qualify as one of the above to purchase this weapon. In accordance with our manufacturer agreements, we are only permitted to sell LE/Mil program weapons to eligible individuals.

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