This is a carousel with one large image and a track of thumbnails below. Select any of the image buttons to change the main image above.

Photo may not accurately depict the item listed. Please be sure to carefully read the title and description of item before placing your order
SIG SAUER

SIG SAUER MCX Rattler PSB, Semi-Automatic, 300 BLK, 5.5" Barrel, 30+1 Rounds

Item # WX2-704922
/Mfg. Number: SIG PMCX300B5BTAPPSB
/UPC: 798681581306
 
5 out of 5 star rating (4 reviews)

Item currently sold out

Key Features

  • .300 AAC Blackout
  • 30+1 rounds
  • 5.5" barrel
  • 3-position pistol brace
  • Free-floating M-Lok® handguard
  • Gas piston system runs cooler and cleaner
  • Includes (1) 30-rd. magazine
View full specifications
View full specifications

Satisfaction Guarantee

Order with complete confidence! Your satisfaction is guaranteed, period! We stand behind every item we sell. If you're not happy within 90 days of shipment, just return the item with your invoice and we'll promptly refund your merchandise total. See More Details

Lowest Price Guarantee

For everything to outfit your passion...at the Lowest Prices, Guaranteed! If you find a lower advertised price for an item we sell, let us know at the time of purchase or within 10 days of placing your order and we will refund you the difference. See More Details

SIG SAUER logo

SIG SAUER® MCX® Rattler PSB .300 AAC Blackout Semi-auto AR Pistol

Rapid deployment, agility and precision: this is the SIG MCX® Rattler. Built around a cool, clean gas piston system, PDW upper, and 5.5" barrel, the MCX platform has never been more compact or versatile. 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. Polished off with a free-floating M-LOK® handguard, the MCX Rattler PSB is the ideal choice for fast-moving operators.

  • Gas piston operating system runs cooler and cleaner than standard direct impingement
  • Built on a PDW (Personal Defense Weapon) upper receiver and 5.5" barrel
  • Telescoping 3-position arm brace
  • SIG Enhanced Trigger with 5.5-9 lb. pull weight
  • Free-floating M-Lok® handguard accepts a wide range of accessories
  • Accepts standard AR-15 magazines
  • Includes (1) 30-rd. magazine

Order today!

Key Specifications

  • Item Number: 704922
  • Caliber: .300 AAC Blackout
  • Action: Semi-automatic (gas piston)
  • Capacity: 30+1
  • Barrel Length: 5.5"
  • Barrel Material: Carbon steel
  • Barrel Twist: 1:5"
  • Brace: 3-position
  • Fire Control: SIG Enhanced
  • Handguard: M-Lok
  • Overall Length: 19.3"
  • Overall Weight: 5.1 lbs.
  • Mfg. Number: PMCX300B5BTAPPSB
  • UPC: 798681581306
Back to top