MCX SBR for Sale
Browse MCX SBR listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The MCX SBR was developed by Sig Sauer to meet military and law enforcement needs for a modular, compact carbine. Designed around versatility, it features a short-stroke gas piston system and folding stock. Today, the MCX SBR targets elite users and NFA registry holders seeking top-tier performance in a compact platform.
Why It's a Top Choice
- Short-stroke gas piston system reduces fouling and heat transfer
- Folding stock for ultra-compact storage and transport
- Interchangeable barrels and calibers for mission flexibility
- Suppressor-ready out of the box with adjustable gas block
- Trusted by special operations and military units globally
Key Variants
MCX Spear LT SBR
Refined with a lightened handguard and ambi controls, ideal for advanced tactical use.
MCX Virtus SBR
Battle-proven reliability with modularity for a wide range of calibers and barrel options.
MCX Rattler SBR
Designed for ultra-concealment, with a 5.5-inch barrel and .300 BLK caliber for CQB.
Competitor Comparison Table
| Feature | Mcx Sbr | Daniel Defense MK18 | BCM Recce 11 KMR-A |
|---|---|---|---|
| MSRP | $2,400+ | $1,900+ | $1,600+ |
| Capacity | 30+1 | 30+1 | 30+1 |
| Weight (unloaded) | 7.9 lbs | 6.7 lbs | 6.1 lbs |
| Optics-Ready | Yes | Yes | Yes |
| Trigger Type | Sig Matchlite Duo | Mil-spec | Mil-spec |
| Notable Pro | Modular barrel/caliber system | USSOCOM fielded | Lightweight and agile |
| Notable Con | Higher cost and NFA paperwork | Fixed gas system | Limited stock adjustability |
Best Use Cases
- Law enforcement or military applications
- Home or vehicle defense (NFA compliant)
- SBR-focused tactical competition
- Suppressor testing and CQB drills
- Advanced rifle collector interest
FAQs
What is an MCX SBR classified as?
It is classified as a short-barreled rifle per the NFA, requiring ATF registration and a tax stamp.
Can I change calibers on a MCX SBR?
Yes, the MCX series supports barrel and caliber swaps for .223, 5.56, and .300 BLK.
How does the MCX SBR compare to the AR-15 platform?
It uses a gas piston instead of direct impingement, runs cleaner, and offers better suppressor integration.
Prefer nearby results? Toggle to search local listings.
Sig Sauer MCX Rattler 5.56 5.5" SBR
$2,599.99
Sig Sauer MCX-SPEAR SBR 6.8X51MM 13'' BB
$4,394.99
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