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The SIG MCX in a discrete platform featuring a folding pistol brace and a 5.5" barrel with PDW upper.

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

Item# Description Availability Qty
MSRP Price Choose Qty
SIGMCX, 300 BLK, Pistol, 5.5IN Barrel, Side Folding Pistol Brace
Back Order (No charges until it ships) 1 $2,719.00 $1,999.00

Rapid deployment, thin, agile and precise. This is the SIG MCX® Rattler. Featuring a 5.5" PDW barrel, the MCX platform has never been more compact or accessible. Ready to go wherever it's needed, the MCX Rattler features a pistol brace for stability and easy concealment. This gun was designed from the ground up to be as discrete as possible while retaining all the robust capabilities of the MCX. Free-floating M-LOK® handguards matched with a PDW upper and 5.5" barrel, the MCX Rattler is the ideal choice for fast-moving operators.

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.
Barrel Length 5.5 in (140 mm)
Mags Included (1) 30 rd Mag
Mag Type AR-15
Sights None, Optics Ready
Action Type Semi-Auto
Stock Type Telescoping 3 PositionBrace
Barrel Material Carbon Steel
Trigger Type SIG Enhanced
Trigger Weight 5.5-9lbs (20-40 N)
Twist Rate 1:5
Overall Length 19.2 in (489mm)
Overall Width 2.8 in (71mm)
Height 8.0 in (203 mm)
Threads None
Accessory Rail M-LOL
Operating System Gas Piston
Weight 5.1 lbs (2.7 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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