Quick Look

The SIG Sauer MPX Copperhead K is a compact variant of the MPX pistol line introduced in 2017 for close-quarters use. Its design emphasizes modularity and short-barreled performance for tactical and home defense roles. It remains popular among enthusiasts seeking a reliable, compact 9mm pistol caliber carbine with a lightweight footprint.

Why It's a Top Choice

• Short 5.5-inch barrel ideal for maneuverability
• Ambidextrous controls for versatile handling
• Modular trigger group for easy customization
• Folding brace enhances portability and concealment
• Reliable piston-driven blowback system for durability

Key Variants

SIG Sauer MPX Copperhead

The original Copperhead model, featuring a 7-inch barrel suited for tactical flexibility.

SIG Sauer MPX Copperhead K

Compact 5.5-inch barrel version focused on enhanced maneuverability in confined spaces.

Competitor Comparison Table

Best Use Cases

• Home defense requiring compact maneuverability
• Tactical applications and law enforcement backup
• Range training for pistol caliber carbine skills
• Concealed carry under proper legal conditions
• Collection for modern pistol caliber carbines

FAQs

Can I use standard Glock magazines with the SIG Sauer MPX Copperhead K?

No, the MPX platform uses proprietary magazines specifically designed for its pistol caliber carbines, not standard Glock magazines.

What is the barrel length of the SIG Sauer MPX Copperhead K?

The Copperhead K model features a 5.5-inch barrel optimized for close-quarters engagement.

How does the folding brace enhance the MPX Copperhead K’s usability?

The folding brace improves portability and storage while maintaining shooting stability when deployed.