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Sig Sauer

Sig Sauer MCX Rattler 300 AAC Blackout

Product Code : 798681600182


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

The Sig MPX Rattler is one of the best options out there for those looking for a 300BLK pistol. The fit and finish on this pistol is excellent and it will make a great suppressor host. We have them in stock and ready to ship to your FFL. We are offering FREE GROUND SHIPPING on all Sig MPX's. 

Comes with one (1) 30 round magazine.

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.


Mag Type AR-15
Barrel Length 5.5 in (140 mm)
Caliber 300 Blk
Height 8.0 in [203 mm]
Overall Length 23 in [584 mm]
Overall Width 2.8 in [71 mm]
Twist Rate 1:5
Weight 5.1 lbs (2.7 kg)
Operating System Gas Piston

Determined at checkout.