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SIG SAUER MCX Rattler 5.56 NATO 5.5in Pistol

SKU: AMC|79865  ·  Condition: New

$2,793.00

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Specifications
UPC 798681600199
Manufacturer

Sig Sauer

Manufacturer Part Number

PMCX-5B-TAP

Product Type

Semi-Auto Pistol

Shipping Weight

8.85

Rate of Twist

1-in-5"

Package Width

11.2

Package Height

4.1

Number of Magazines

1 30 rd. Magazine

Capacity

30 + 1

Caliber/Gauge

.223 REM/5.56 NATO

ATF Type

Pistol

Barrel Length

5.5"

Action

Semi-Auto

About This Firearm

Compact SIG SAUER MCX Rattler pistol chambered in .223 Rem/5.56 NATO with a 5.5-inch barrel, M-LOK handguard, PCB pivoting contour brace, and a 30+1 capacity for range and close-quarters use.

The SIG SAUER MCX Rattler is a compact, pistol-configured rifle-caliber platform built for maneuverability and controlled handling. It is chambered for .223 Rem/5.56 NATO and fitted with a short 5.5-inch barrel and an M-LOK handguard for accessory mounting. The platform ships with a PCB pivoting contour brace and accepts a 30-round magazine, making it suited to range use and close-quarters scenarios where a compact profile is desired.

Key Specifications

  • The firearm is chambered in .223 REM/5.56 NATO.
  • The barrel measures 5.5 inches for a compact overall package.
  • The stated capacity is 30 + 1.
  • The action is Semi-Auto.
  • The frame is constructed as an Alloy Frame.
  • The installed brace/grip is a PCB – Pivoting Contour Brace.
  • The handguard features an M-Lok Handguard for modular accessory mounting.
  • The muzzle device is a 3-Prong Flash Hider.
  • The finish is listed as Black Nitride.
  • The overall length is listed as 19.3 inches.

The MCX Rattler delivers a tightly packaged, manageable 5.56 NATO platform with modern attachment options and a high-capacity magazine configuration. Its compact footprint and M-LOK handguard make it a practical choice for shooters who prioritize maneuverability and accessory flexibility while remaining rooted in proven SIG SAUER engineering.

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Massachusetts Notice
A valid Massachusetts LTC or FID is required to purchase this firearm. All sales are completed in-store at our Sutton, MA location. Need your LTC? We offer classes.