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🚚 Ships to your local FFL — we handle the paperwork and coordinate with your dealer. Most firearms ship same or next business day. Local? Free in-store pickup in Roanoke, TX.
The Sig Sauer M400 SDI is a reliable semi-automatic AR platform rifle chambered in .223 Remington with a 16″ cold hammer forged barrel and 30-round capacity for sporting and recreational shooting.
The Sig Sauer M400 SDI 223 Remington rifle delivers proven reliability for sport shooters and recreational users. This semi-automatic AR platform firearm features a 16″ cold hammer forged steel barrel built to deliver consistent performance. The M400 SDI chambers .223 Remington / 5.56 NATO ammunition and feeds from a 30-round magazine, making it versatile for training, target shooting, and weekend range sessions.
Additionally, this rifle includes Sig Sauer’s 2-Stage Matchlite Duo trigger for crisp, predictable breaks. The low-profile gas block with mid-length gas system keeps the action running smoothly shot after shot. A Magpul SL stock provides a comfortable shoulder fit and repeatable cheek weld for better accuracy.
Professional Cerakote Finish
Furthermore, the Flat Dark Earth Cerakote finish protects the rifle from corrosion and wear in the field. Cerakote offers superior durability compared to standard parkerizing or bluing. This finish resists scratches, moisture, and daily handling while maintaining a professional appearance through years of use.
Ideal for Target Shooting and Training
Moreover, the M400 SDI excels in recreational shooting environments where accuracy and reliability matter. The combination of the quality barrel, match-grade trigger, and proven AR platform design makes this rifle a dependable choice. Whether you’re drilling fundamentals at 25 yards or testing your skills at 100 yards, the M400 SDI performs consistently.
In addition, the 30-round capacity and semi-automatic action give shooters the ability to practice rapid, accurate follow-up shots. The AR platform design means aftermarket accessories and ammunition are readily available and affordable. Sig Sauer’s reputation for quality manufacturing backs every M400 SDI that leaves the factory.
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 and handle all federal firearms transfers in compliance with Texas law. Call us at 817-393-4000 to check current inventory or schedule your transfer.
Why Buy from Western Sport?
Licensed FFL/SOT dealer with 17+ years of North Texas firearms expertise.
Knowledgeable staff ready to answer questions about specs, maintenance, and best practices.
Competitive pricing on Sig Sauer rifles and all major firearms brands.
Fast, professional federal firearms transfers handled right here in Roanoke.
Ongoing customer support and local service after your purchase.
Frequently Asked Questions
Q: Is the Sig Sauer M400 SDI compatible with standard AR-15 magazines and parts?
A: Yes, the M400 SDI is built on the proven AR platform and accepts standard AR magazines and accessories. The 30-round magazine included with your rifle is widely compatible with other AR-platform firearms.
Q: What warranty does Sig Sauer provide with the M400 SDI?
A: Sig Sauer backs the M400 SDI with their standard manufacturer warranty. Western Sport’s sales team can provide complete warranty details and registration information when you purchase.
Q: How long does the federal firearms transfer process take at Western Sport in Texas?
A: Federal law requires a background check and a minimum waiting period. We handle all paperwork efficiently and keep you informed throughout the process. Call 817-393-4000 for details on current transfer timelines.
Q: What is the best use case for the M400 SDI?
A: The M400 SDI excels in recreational and sporting shooting, target practice, and training. The match-grade trigger and quality barrel make it accurate enough for precision work, while the semi-automatic design suits high-volume practice sessions.
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