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Sig Sauer

Sig Sauer MCX Rattler PCB Pistol with Folding Brace .300 Blackout 30+1, 5.5" Barrel, Black

Product Code : Not Specified


Mfg Item #: PMCX-300B-5B-TAP

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 PCB features a folding pivoting contour 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 PCB is the ideal choice for fast-moving operators.


  • 5.5” barrel with PDW Upper
  • Free Floating Handguard
  • SIG Side-folding PCB (Pivoting Contour Brace)


  • Caliber: .300 AAC Blackout
  • Operating System: Gas Piston
  • Action: Semi-Auto
  • Finish: Black Nitride
  • Handguard: M-Lok
  • Sights: None
  • Brace: SIG PCB Side Folding Fixed Brace
  • Trigger: SIG Matchlite Duo
  • Muzzle Device: 3-Prong Flash Hider
  • Barrel Material: Cold Hammer Forged Carbon Steel
  • Barrel Length: 5.5”
  • Twist: 1-5”
  • Overall Length: 23”
  • Width: 2.8”
  • Height: 8”
  • Weight: 5.1 lbs.
  • Mags Included: (1) 30 Round

Prohibited States: California, New York, New Jersey, Massachusetts, Vermont and Hawaii. It is the buyer's responsibility to know their local laws. Please check local compliance before purchasing. 

Shipping includes insurance. Alaska pays actual shipping cost.

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