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Machine Gun Kings

Home / SIG Sauer MCX Rattler .300AAC-Blackout Semi-Auto-Pistol 5.5-inches 30Rds
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SIG Sauer MCX Rattler .300AAC-Blackout Semi-Auto-Pistol 5.5-inches 30Rds

SIG Sauer MCX Rattler .300AAC-Blackout Semi-Auto-Pistol 5.5-inches 30Rds

Original price was: $2,299.99.Current price is: $1.72.

SIG Sauer MCX Rattler .300AAC-Blackout Semi-Auto-Pistol 5.5-inches 30Rds Features:

This semi automatic platform is designed to work on the clean running gas piston system. The MCX Rattler is built with a carbon steel barrel supports user swap ability makes this platform a real winner. This particular model features the SIG Sauer Enhanced trigger, free float M-LOK hand guard and Pistol stabilizing brace.

SIG Sauer MCX Rattler .300AAC-Blackout Semi-Auto-Pistol 5.5-inches 30Rds Specifications:

  • SIG Sauer MCX Rattler Semi Auto Pistol PMCX-300B-5B-TAP
  • Gas Piston System
  • .300 AAC Blackout
  • 5.5″ Carbon Steel Barrel
  • Threaded 5/8″x24
  • 1:5″ Twist Rate
  • 30 Round Polymer Magazine
  • AR-15 Magazine Compatible
  • Free Floating M-LOK Aluminum Hand Guard
  • SIG Sauer Enhanced Trigger
  • Polymer Grip
  • SIG Sauer Side Folding PCB (Pivot Contour Brace) Pistol Stabilizing Brace
  • SIG Sauer Muzzle Device
  • Aluminum Frame
  • Compact Platform
  • Ambidextrous AR Style Controls
  • Overall Width 2.8″
  • Overall Height 8″
  • Overall Length 23″ Extended
  • Overall Weight 5.1lbs
  • Matte Black Finish

In Stock – Ships 3-4 Days

SKU: a455884e2001 Category: Tags: , , , , , ,

Description

SIG Sauer MCX Rattler .300AAC-Blackout Semi-Auto-Pistol 5.5-inches 30Rds — $1.724992516

In Stock & Ready to Ship to your New Mexico FFL dealer.

Key Features

  • ✅ Sig Sauer Quality — Factory precision and proven reliability
  • ✅ New Mexico Legal — Compliant with all NM state regulations
  • ✅ In Stock & Ships Fast — 3–5 business days to your NM FFL
  • ✅ Authorized Dealer — Full manufacturer warranty included
  • ✅ Expert Support — Real NM firearms experts
  • ✅ New Customer Discount — 20% off first order with code WELCOME20

    • – ✅ **NM Permitless Carry Ready** — No permit needed in New Mexico since 2021
    – ✅ **Concealed Carry Optimized** — Compact, reliable, all-day comfortable

Technical Specifications

Specification Detail
Manufacturer Sig Sauer
Model SIG Sauer MCX Rattler .300AAC-Blackout Semi-Auto-Pistol 5.5-inches 30Rds
Action Semi-Auto / Striker-Fired
Compliance New Mexico Legal
Warranty Full Manufacturer Warranty

Why Buy from Machine Gun Kings?

New Mexico’s trusted source for AR components, tactical platforms, and firearms. 15+ years serving NM gun owners. Licensed FFL dealer. Shipping daily to: Taos, Las Cruces, Lovington, Gallup, Artesia, Hobbs, Belen, Carlsbad.

New Mexico Gun Law Quick Facts

  • ✅ Permitless Carry — Constitutional carry since 2021
  • ✅ No Waiting Period — Take delivery same day (after NICS)
  • ✅ No Magazine Limits — Zero capacity restrictions
  • ✅ Castle Doctrine — Strong home defense protections

Frequently Asked Questions

Do I need a permit to carry this pistol in New Mexico?

No. New Mexico passed constitutional carry in 2021. Any law-abiding resident 19+ can carry concealed without a permit.

What’s the best holster for this pistol in NM?

We carry Kydex IWB and OWB holsters for most pistols. Contact us for recommendations matched to your carry style.

Does the SIG Sauer MCX Rattler .300AAC-Blackout Semi-Auto-Pistol 5.5-inches 30Rds come with a warranty?

Yes. As an authorized Sig Sauer dealer, Machine Gun Kings ensures every SIG Sauer MCX Rattler .300AAC-Blackout Semi-Auto-Pistol 5.5-inches 30Rds includes the full manufacturer warranty.

Can I use the WELCOME20 coupon?

Yes! New customers get 20% off their first order at Machine Gun Kings. Use code WELCOME20 at checkout.

How long does shipping take to New Mexico?

Most orders reach your FFL within 3–5 business days. We ship Monday–Friday from our New Mexico warehouse.

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