Sig Sauer M400 SDI X, Semi-automatic Pistol, 5.56 NATO, 11.5″ Threaded Barrel, Black, 30 Rounds

Product Description

The Sig Sauer M400 SDI 5.56 NATO pistol delivers reliable AR platform performance in a compact, purpose-built package. This semi-automatic firearm features an 11.5″ threaded barrel designed for suppressors and muzzle devices. The M400 SDI X combines Sig Sauer’s engineering expertise with modern ergonomics for confident shooting.

Additionally, the pistol accepts 30-round magazines and comes equipped with a pistol brace for enhanced control. Furthermore, the anodized black finish resists corrosion during extended outdoor use. The AR platform design means shooters benefit from modular components and aftermarket compatibility.

Specifications & Performance

This model chambers 5.56 NATO ammunition, offering velocity and accuracy suitable for sporting applications. Moreover, the 11.5″ barrel balances maneuverability with ballistic performance. The 30-round capacity supports competitive shooting and recreational range sessions without frequent reloads.

The Sig Sauer M400 SDI X handles well in dynamic shooting scenarios. Additionally, the threaded barrel allows shooters to customize their setup with suppressors or other muzzle devices. Indeed, the pistol brace configuration provides a stable platform for both standing and supported fire positions.

Ideal Use Cases

This firearm excels for sporting and recreational shooters seeking a versatile platform. Furthermore, competitive shooters appreciate the modular AR design and magazine capacity. Finally, the compact form factor makes the M400 SDI X suitable for varied range environments and training courses.

Available at Western Sport – Roanoke, TX

Western Sport is a licensed FFL/SOT dealer serving the North Texas and DFW area since 2007. We stock the Sig Sauer M400 SDI X and provide expert guidance on transfers and local compliance. Call us at 817-393-4000 to check availability or discuss your needs with our knowledgeable staff.

Why Buy from Western Sport?

• Licensed FFL/SOT dealer with 15+ years of professional service in North Texas.
• Competitive pricing on premium Sig Sauer firearms and accessories.
• Fast, efficient transfers handled by experienced staff.
• Knowledgeable team ready to answer questions about specs, compatibility, and local regulations.
• Local North Texas support and after-sale expertise for your firearms needs.

Frequently Asked Questions

Q: Is the Sig Sauer M400 SDI compatible with standard AR-15 components?

A: Yes, the M400 SDI X uses the AR platform design, making it compatible with a wide range of aftermarket parts and accessories. You can customize the pistol to suit your shooting style and preferences.

Q: Does Sig Sauer offer a warranty on the M400 SDI X?

A: Sig Sauer firearms come with a manufacturer’s warranty. We recommend contacting Sig Sauer directly or asking our staff at Western Sport for specific warranty details and coverage terms.

Q: What is the process for purchasing a pistol in Texas?

A: As a licensed FFL dealer, Western Sport handles all required background checks and transfers in compliance with Texas and federal law. Call 817-393-4000 to learn about our transfer process and timeline.

Q: What is the best use for the M400 SDI 5.56 NATO pistol?

A: The M400 SDI X excels in sporting and recreational shooting applications. Its compact size, 30-round capacity, and threaded barrel make it ideal for range training, competitive shooting, and dynamic firearms courses.

Additional information