Sig MCX Rattler Pistol .300 Black Out 5.5″ Barrel M-Lok Handguard Sig Sauer

Original price was: $2,749.99.Current price is: $2,199.99.

Sale!
Sig MCX Rattler Pistol .300 Black Out 5.5" Barrel M-Lok Handguard

Sig MCX Rattler Pistol .300 Black Out 5.5″ Barrel M-Lok Handguard Sig Sauer

Original price was: $2,749.99.Current price is: $2,199.99.

SKU: 798681600182 Category: Tag:
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)

Caliber: .300 Blackout

Weight: 5.1 lbs w/ magazine

Rifle Overall Length: 19.3″

Action: Gas Piston – Semi-Automatic

Trigger: Sig Enhanced

Safety: AR Selector Switch

Rifle Barrel Length: 5.5″

Rifle Barrel Twist: 1:5

Rifle Stock: Pistol Brace

Scope Mount: Picatinny Rail

Magazines Included: (1) 30 Round

Iron Sights No

Caliber or Gauge: .300 BLK

Handedness Right Hand

FFL Transfer & Firearms Laws for Sig MCX Rattler Pistol .300 Black Out 5.5" Barrel M-Lok Handguard Sig Sauer

All firearms, including the Sig MCX Rattler Pistol .300 Black Out 5.5" Barrel M-Lok Handguard Sig Sauer, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.

How It Works

  1. Place your order online.
  2. Provide your preferred FFL dealer information.
  3. We ship the firearm directly to your FFL.
  4. You complete the background check and pickup at the FFL.

Legal Compliance

We comply with all federal and state firearm laws. It is your responsibility to ensure the Sig MCX Rattler Pistol .300 Black Out 5.5" Barrel M-Lok Handguard Sig Sauer is legal in your state. Some states may have restrictions on certain firearm models or features.

Helpful Resources

Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.

Frequently Asked Questions About This Product

Why buy Sig MCX Rattler Pistol .300 Black Out 5.5" Barrel M-Lok Handguard Sig Sauer from Miami Shooters Supply?

We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.

Where can I buy Sig MCX Rattler Pistol .300 Black Out 5.5" Barrel M-Lok Handguard Sig Sauer?

You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.

Is Sig MCX Rattler Pistol .300 Black Out 5.5" Barrel M-Lok Handguard Sig Sauer available now?

Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.

What category does this product belong to?

This product is listed under: .

What tags or features does this product have?

Key features and tags for this product include: .

Is this product legal in my state?

It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.

Additional information

Classification

Firearm
Manufacturer Number

PMCX-300B-5B-TAP
Brand

Sig Sauer
interest

AR-15 Pistols, Sig AR Pistols

FFL Transfer & Firearms Laws

All firearms, including the Sig MCX Rattler Pistol .300 Black Out 5.5" Barrel M-Lok Handguard Sig Sauer, must be shipped to a licensed Federal Firearms License (FFL) dealer. A background check and any required local paperwork must be completed before you can take possession.

How It Works
  1. Place your order online.
  2. Send us your preferred local FFL dealer info.
  3. We ship the firearm to your FFL after verification.
  4. Complete background check and pick up from your dealer.
Legal Compliance

We comply with all U.S. firearm laws. It is your responsibility to ensure the Sig MCX Rattler Pistol .300 Black Out 5.5" Barrel M-Lok Handguard Sig Sauer is legal in your state. Some states (e.g. CA, NY, NJ) have restrictions on magazine size or certain features.

Helpful Links

Need help? Contact our team — we’ll guide you through selecting a compliant firearm and the FFL transfer process.

Related products