1. Firearms
  3. Handgun Semi-Auto
  5. AR-15 Pistols

Sig Sauer MCX Rattler 300 Blackout Semi-Auto Pistol with Pistol Stabilizing Brace

  • Item Number: PMCX-300B-5B-TAP-PSB
  • /
  • View More Items by Sig Sauer
  • /
  • Condition: NEW
Sig Sauer MCX Rattler 300 Blackout Semi-Auto Pistol with Pistol Stabilizing Brace
SIG SAUER MCX Rattler 300 Blackout Semi-Auto Pistol with Pistol Stabilizing Brace
$2,299.99 $2,719.00

No Longer Available
This product is no longer available. We don't know when or if it will be back in stock.
  • AMERICAN TACTICAL ATI GAX3007MLTB ALPHA MAXX 300BLK 7.5 W/BLADE

    American Tactical Alpha MAXX 300 Blackout Semi-Auto AR-15 Pistol
    $344.99

  • Q HONEY BADGER 300BLK 7` BARREL WITH BRACE GRAY ACCENTS

    Q Honey Badger 300 Blackout AR Pistol with Brace and 7-Inch Barrel
    $3,200.00

  • MAXIM DEFENSE PDX - PISTOL - 300 BLACKOUT - ARID

    Maxim Defense PDX 300 Blackout AR-15 Pistol with Arid Finish
    $2,495.00

  • CMMG BANSHEE MK4 300 BLK 8` TUNGSTEN

    CMMG Banshee MK4 300 Blackout Pistol with 8 Barrel Barrel and Tungsten Cerakote Finis
    $1,474.95 $1,319.99

  • RADICAL FIREARMS RF-15 300 BLK 8.5 30 RD BLACK

    Radical Firearms AR-15 Milspec Hbar 300 BLK Pistol w/ 30-Round Magazine
    $479.99

  • CMMG BANSHEE 300BLK MK4 8` COYOTE TAN

    CMMG BANSHEE Mk4 300 Blackout AR Pistol with Coyote Tan Finish
    $1,349.99

  • CMMG BANSHEE MK4 300 BLACKOUT 8 IN BARREL ARMOR BLACK

    CMMG BANSHEE Mk4 300 Blackout AR15 Pistol with Armor Black Finish
    $1,319.99

  • CMMG BANSHEE 300 BLK 8` FS GREEN

    CMMG Manshee Mk4 300 Blackout Semi-Auto Pistol with 8 Inch Barrel and FS Green Cerakote Finish
    $1,549.95 $1,349.99

  • MAXIM DEFENSE PDX - PISTOL - 300 BLACKOUT - ARID COMBO

    Maxim Defense PDX 300 Blackout AR-15 Pistol with Pelican 1525 Air Case and Vortex AMG UH-1 Gen II Sight
  • FRANKLIN ARMORY REFORMATION 300 BLACKOUT 11.5 IN BARREL FOLDING STOCK 30 RD MAGAZINE

    Franklin Armory Reformation RS11 Libertas 300 Blackout Non NFA Firearm with Binary Elite Trigger
    $1,669.99 $1,349.99

  • MAXIM DEFENSE MDX 508-CP 300 BLACKOUT 8.75 IN BARREL FDE CPB BRACE

    Maxim Defense MDX508 300 Blackout Semi-Auto Pistol
    $2,429.99

  • Hornady 300 Blackout 208 gr Subsonic FMJ Frontier 20/Box

    Hornady 300 Blackout 208 gr Subsonic FMJ Frontier 20/Box
    $15.99
    ($0.80 / round)

  • Hornady 300 Blackout 125 gr FMJ Frontier 20/Box

    Hornady 300 Blackout 125 gr FMJ Frontier 20/Box
    $14.99
    ($0.75 / round)

  • Hornady 300 Blackout 110 gr V-Max Black 20/Box

    Hornady 300 Blackout 110 gr V-Max Black 20/Box
    $29.99
    ($1.50 / round)

  • Hornady 300 Blackout 208 gr A-MAX Black (Subsonic) 20/Box

    Hornady 300 Blackout 208 gr A-MAX Black (Subsonic) 20/Box
    $25.99
    ($1.30 / round)

  • Sig Sauer 300 Blackout 125 gr Sierra MatchKing Elite Match OTM 20/Box

    Sig Sauer 300 Blackout 125 gr Sierra MatchKing Elite Match OTM 20/Box
    $27.99
    ($1.40 / round)

  • Federal 300 Blackout 150gr Jacketed Soft Point Power-Shok 20/Box

    Federal 300 Blackout 150gr Jacketed Soft Point Power-Shok 20/Box
    $34.99 $22.99
    ($1.15 / round)

  • Norma 300 Blackout 147 gr FMJ Range and Training 20/Box

    Norma 300 Blackout 147 gr FMJ Range and Training 20/Box
    $16.99
    ($0.85 / round)

  • Federal 300 Blackout 190gr Fusion Tipped Subsonic 20/Box

    Federal 300 Blackout 190gr Fusion Tipped Subsonic 20/Box
    $40.99 $27.99
    ($1.40 / round)

  • Federal 300 Blackout 150 gr FMJ Boat Tail American Eagle 20/Box

    Federal 300 Blackout 150 gr FMJ Boat Tail American Eagle 20/Box
    $28.99 $16.99
    ($0.85 / round)

  • Hornady 300 Blackout 135 gr FTX Custom 20/Box

    Hornady 300 Blackout 135 gr FTX Custom 20/Box
    $28.99
    ($1.45 / round)

  • Hornady 300 Blackout 110 gr CX Custom 20/Box

    Hornady 300 Blackout 110 gr CX Custom 20/Box
    $26.99
    ($1.35 / round)

  • Corbon Ammunition 300 Blackout 110 Grain DPX 20/Box

    Corbon Ammunition 300 Blackout 110 Grain DPX 20/Box
    $35.99
    ($1.80 / round)

Product Description

What's in the Box

  • MCX Rattler 300 Blackout
  • (1) Magazine
  • Cable Lock
  • Owner's Manual

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.

Firearm Specifications

  • Manufacturer: Sig Sauer
  • Model: MCX Rattler
  • Model Number: PMCX-300B-5B-TAP-PSB
  • Caliber: 300 Blackout
  • Barrel Length: 5.5"
  • Overall Length: 19.3"
  • Width: 2.8"
  • Height: 8.0"
  • Trigger Weight: 5.5-9 lbs.
  • Twist Rate: 1:5"
  • Accessory Rail: M-LOK
  • Operating System: Gas Pistol
  • Trigger Type: SIG Enhanced
  • Barrel Material: Carbon Steel
  • Stock Type: Telescoping 3-Position Brace
  • Magazine: 1- 30 Round Magazine

Customer Comments & Questions

Customer Reviews

No reviews have been written for this product.

Write a review
Back to top