Sig Sauer MCX Rattler 300 BLK 5.5" Black 30rd PMCX-300B-5B-TAP-PSB For Sale | SHIPS FREE | -

Thanks for submitting your message. We will reach you shortly.

shipping update Holiday Sale

Sig Sauer MCX Rattler 300 BLK 5.5" Black 30rd PMCX-300B-5B-TAP-PSB

This product is discontinued and no longer available.

  • Government Export Restriction:

    Government Export Restriction
    This item may be regulated for export by the U.S. Department of State or the US Department of Commerce. Please see our Export Policy.

  • FFL Requirements:

    FFL Requirements: FFL Requirements
    This item can only be shipped to a Licensed Federal Firearms Dealer. Please follow this link to review firearms shipping requirements.

  • ITAR Product:

    ITAR Product: ITAR Product
    By adding to cart, I understand, acknowledge, and agree to the Export Policy. I am a US Person, and I do not intend to export this product. Please see our Export Policy.

When the US Special Operations Command put out a request for a Personal Defense Weapon (PDW) to replace the MP5, Sig Sauer responded with the MCX Rattler; an absolutely groundbreaking short barrel rifle. The Rattler is based on Sig Sauer's flagship MCX modular rifle, featuring its short-stroke recoil gas piston operating system. What separates Sig Sauer's MCX platform from other AR/M4 style rifles is the recoil system that totally eliminates the need for a buffertube, making the MCX Rattler more compact than any AR/M4 rifle ever produced. The MCX Rattler PSB (pistol version) has a length of 19.3 inches when arm brace is collapsed and the MCX Rattler SBR has a length of only 16 inches when the stock is folded; both versions of the MCX weigh under 6 lbs. The rifle is currently chambered in .300 BLK features a 5.5 inch suppressor ready barrel and a aluminum free-floated handgaurd with M-LOK attachment points.

Additional Features and Information

  • Hammer forged carbon steel barrel and three pronged flash hider
  • Features the Sig Enhanced Trigger
  • Ambidextrous AR-style controls and dual-paddle bolt-release
  • M1913 rail from charging handle to muzzle
  • Two position gas regulator for suppressed or unsuppressed fire
  • 3 position telescoping arm brace (PSB) or folding stock (SBR)

About Sig Sauer

From humble beginnings as a wagon to factory to one of the world’s largest firearms, optics, and ammunition manufacturers; the history of Sig Sauer is rich in innovation and achievement. After winning a contract from the Swiss government in 1864 for their Prelz-Burnand muzzleloading rifles, the Swiss Wagon Factory change its name to Schweizerische Industrie-Gesellschaf, the Swiss Industrial Company, better known as SIG. In 1949 SIG developed the SIG P49, the predecessor to the P210 and continued developing small arms for the Swiss military and police.

Since then the company has changed its name, acquired other firearm manufacturers, and crossed the Atlantic—setting up headquarters in New Hampshire. However, what hasn’t changed is the innovative spirit that has driven SIG SAUER develop firearms like the SIG516 rifle, MCX rifle, P320 pistol, and P226 pistol. With clients like the Texas Rangers, United States Secret Service, Navy Seals, and dozens of local law enforcement agencies nationwide; SIG SAUER is there When It Counts.


Caliber:300 BLK
Weight:5.1 lbs
Rifle Overall Length:19.3 in
Trigger:Sig Enhanced
Safety:Selector Safety
Rifle Barrel Length:5.5"
Rifle Barrel Twist:1:5"
Rifle Stock:3 Position Telescoping PSB
Scope Mount:M1913
Magazines Included:(1) 30 round
Handedness:Right Hand
Item Condition:New
Sig Sauer MCX Rattler 300 BLK 5.5" Black 30rd PMCX-300B-5B-TAP-PSB
Average Rating:
No reviews to show. Be the first one to review!
View More Reviews

Please login to give a review

I Forget.

New User? Sign up now
join now win big Modify Your Subscription