Description
The SIG SAUER .223 REM/5.56 NATO GAS PISTON 30 ROUNDS 11.5 BARREL is a high-performance, short-barreled pistol built on the proven MCX platform. It delivers rifle-caliber power in a compact, maneuverable package ideal for close-quarters defense and tactical use, featuring a reliable gas piston operating system and a 30-round magazine capacity.
Key Features
- Gas Piston Reliability: Runs cleaner and cooler than direct impingement, especially in a compact 11.5-inch configuration. When it comes to home defense, you need a system that won’t foul under rapid fire.
- Compact & Maneuverable: The 11.5-inch barrel length strikes a balance between ballistic performance and ease of handling in tight spaces. It’s a practical choice for vehicle or structure.
- MultiCam & Cerakote Durability: The full MultiCam pattern over a Cerakote receiver finish isn’t just for looks—it provides serious abrasion and corrosion resistance in varied environments.
- MCX Platform Compatibility: This pistol is built to accept a wide range of aftermarket stocks/braces, triggers, and handguards designed for the SIG MCX series, offering extensive customization.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | .223 Remington / 5.56x45mm NATO |
| Barrel Length | 11.5 Inches |
| Operating System | Short-Stroke Gas Piston |
| Magazine Capacity | 30 Rounds (1 included) |
| Overall Finish | MultiCam over Cerakote |
| MSRP | $2699.99 |
The heart of this system is the short-stroke piston, a design that keeps carbon and heat out of the receiver. This translates to longer intervals between cleanings and consistent function. The 11.5-inch barrel, a favorite among professionals, optimizes velocity—you’re looking at effective performance out to 300 yards with the right ammunition. At a price point of $2699.99, this SIG represents a significant investment in a top-tier, duty-ready platform that’s drop-in ready for a quality optic and white light. It ships to Missouri and compliant US states.
Who This Pistol Is For
This is a tool for the serious user who understands the advantages of a piston-driven system in a compact format. It’s for the defender who prioritizes absolute reliability in a high-stress scenario, the tactical shooter who values a cleaner-running action during extended training sessions, and the enthusiast who appreciates the modularity and pedigree of the SIG MCX line. It’s not a plinker’s first gun; it’s a professional-grade instrument.
Pros & Cons
Pros: Superior reliability and cleaner operation than AR-15 direct impingement guns. The 11.5-inch barrel is the practical sweet spot for a 5.56 pistol. Exceptional durability from the Cerakote under the MultiCam. High degree of customization with the MCX aftermarket. Fits out of the box with most standard AR-15 armorer’s wrenches for basic maintenance.
Cons: The premium price tag is a barrier for some. Piston systems can be slightly heavier than comparable DI guns. The 11.5-inch barrel still produces significant muzzle blast and noise, necessitating hearing protection at all times and consideration for a muzzle device.
Frequently Asked Questions
Q: Is this considered a pistol or a short-barreled rifle (SBR)?
A: As configured from the factory with a pistol brace (or buffer tube), it is legally a pistol. This allows for purchase without the tax stamp, wait, and registration of an NFA item. Always verify current state and federal regulations.
Q: What magazines does it use?
A: It utilizes standard AR-15/M4 pattern magazines. This includes popular brands like Magpul PMAGs, Lancer L5AWM, and USGI aluminum mags, giving you vast and affordable options for spare magazines.
Q: Can I attach a stock to this?
A: Attaching a stock to a firearm with a barrel under 16″ creates a Short-Barreled Rifle (SBR), which requires filing a Form 4 with the ATF, paying a $200 tax, and receiving approval before installation. The platform is designed to accept stocks once in an NFA configuration.
Ready to handle a professional-grade compact system? This SIG SAUER MCX pistol is available at firearms-missouri.com for Missouri residents and nationwide.




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