SIG MCX for Sale
Browse Sig MCX listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The Sig MCX was introduced by Sig Sauer in 2015 as a modular, multi-caliber rifle platform. It prioritizes adaptability and compact design for tactical and civilian use. The MCX remains popular among operators and enthusiasts for its versatility and customization options.
Why It's a Top Choice
- Modular design supports caliber and barrel swaps
- Reliable short-stroke gas piston system
- Compact and lightweight for maneuverability
- Wide aftermarket accessory compatibility
- Folding stock enhances transportability
Key Variants
Sig MCX Virtus — Modernized with improved ergonomics and lighter weight for tactical users.
Sig MCX Patrol — Semi-automatic variant for civilian markets focusing on law enforcement-style features.
Sig MCX Rattler — Ultra-compact PDW version ideal for close-quarters engagements.
Competitor Comparison Table
| Feature | Sig MCX | Daniel Defense DDM4 | HK416 |
|---|---|---|---|
| MSRP | $1,800–$2,200 | $1,700–$2,000 | $3,000–$3,600 |
| Capacity/Size | Multi-caliber, 16–30 rounds | 5.56 NATO, 20–30 rounds | 5.56 NATO, 30 rounds |
| Weight | 6.9–7.5 lbs | 6.5–6.8 lbs | 7.9–8.4 lbs |
| Optics-Ready | Yes, full rail | Yes, full rail | Yes, full rail |
| Trigger Type | Single-stage, flat trigger | Two-stage | Single-stage |
| Notable Pro | Multi-caliber flexibility | Durable, proven design | Used by multiple militaries |
| Notable Con | Higher price point | Less modular | Heavier weight |
Best Use Cases
- Tactical missions and law enforcement
- Self-defense and home protection
- Competition shooting
- Range training and practice
- Versatile platform for firearm enthusiasts
FAQs
Can I swap calibers easily on the Sig MCX?
Yes, the MCX features a quick-change barrel and bolt system allowing caliber swaps—such as 5.56 NATO to .300 Blackout—without specialized tools.
What is the operating system of the Sig MCX?
The MCX uses a short-stroke gas piston system, enhancing reliability over direct impingement designs especially in adverse conditions.
How does the Sig MCX Rattler differ from the standard MCX?
The Rattler is a compact PDW variant with a shorter barrel and stock, designed for close-quarters use and easier maneuverability.
Prefer nearby results? Toggle to search local listings.
SIG MCX Rattler LT .300 BLK Pistol with
$2,595.00
Sig MCX 5.56 5.5" Rattler PDW Stock SBR
$2,329.00
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