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SIG SAUER MCX Rattler 300BLK SBR - 5.5"

Short-Barrel Rifle

Out of stock

FFL & SOT Required Before Shipping.
Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.


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 PSB features a 3-position telescoping 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 PSB is the ideal choice for fast-moving operators.



  • ACCESSORY RAIL- Gas Piston
  • MAG TYPE- AR15
  • BARREL LENGTH- 5.5 in (140 mm)
  • MAGS INCLUDED- (1) 30rd Aluminum Mag
  • Semi-Auto
  • STOCK TYPE-Folding SBX
  • BARREL MATERIAL- Carbon Steel
  • TRIGGER TYPE- SIG Enhanced
  • TRIGGER WEIGHT- 5.5-9 lbs (24-40 N)
  • TWIST RATE-1:5
  • OVERALL LENGTH- 23.5 in (597 mm)
  • OVERALL WIDTH- 2.8 in (71 mm)
  • HEIGHT- 8.0 in (203 mm)
  • WEIGHT- 5.7 lbs


More Information
Product Type Short-Barrel Rifle
Manufacturer Sig Sauer
Barrel Length 5.5"
Caliber 300 Blackout
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