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Sig Sauer M400 SDI 5.56x45mm, 11.5″ Threaded Barrel, Black, M-Lok Handguard, 30rd

Original price was: $1,499.99.Current price is: $839.99.

Sig Sauer M400 SDI 5.56x45mm, 11.5″ Threaded Barrel, Black, M-Lok Handguard, 30rd Firearm

SKU: 798681698967 Categories: , , Tags: , , , ,
Building upon decades of experience and countless hours of instruction, we have developed the M400-SDI X Pistol to meet the highest standards of performance and reliability. With fully ambidextrous controls including a bolt catch/and release unique to the M400-SDI lower receiver, the M400-SDI X Pistol delivers advanced performance for both left & right-handed shooters and makes transitional shooting easier than ever. The free-floating handguard utilizes a new steel lockup design that significantly reduces handguard deflection by providing maximum rigidity and allows for accessories to be attached on all four sides with no effect on accuracy. The 2-Stage Matchlite Duo trigger provides an out-of-the-box crisp 4.5 – 6.5lb pull weight with a flat blade design for a precision feel. The M400-SDI X Pistol utilizes the highest quality performance coatings to ensure maximum durability and reliability.


  • Brand : Sig Sauer
  • Category : Tactical Rifles
  • Series : SDI
  • Model : M400
  • Caliber : 5.56 NATO
  • Barrel Length Range : 11″ to 11.99″
  • Operating System : Carbine
  • Capacity : 30+1
  • Action : Semi-Auto
  • OAL : 30.20″
  • Sights : Optic Ready
  • Barrel Finish : Black FNC
  • Barrel Material : Chrome Moly Steel
  • Grips : Polymer
  • Handguards : M-LOK
  • Height : 7.10″
  • Includes : Magazine
  • Stock Type : Magpul BSL Brace
  • Thread Pattern : 1 / 2″x28 tpi
  • Width : 2.80″
  • Barrel Description : Chrome Moly Steel
  • Barrel Length : 11.50″
  • Receiver Finish : Anodized
  • Trigger : Flatblade Match
  • Weight : 5.80 lbs
  • Stock Finish : Black

About the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd

Elevate your shooting experience with the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd, a high-performance product in The Gun Shop’s AR-15 Rifles range. Renowned for its craftsmanship, this item is designed to meet the demands of modern shooters, blending style, functionality, and resilience. Its standout features include Brand :: Sig Sauer; Model: Sig Sauer M400; Interests: AR-15 Rifles, Sig Sauer; Rounds: 30; Manufacturer Number: PM400SDI11BBLK; Caliber: 5.56x45mm, making it ideal for competitive shooting, hunting, or personal defense. Tags: AR-15 Rifles, Firearm, M400, Sig Sauer, Sig Sauer M400, highlighting its versatility for shooting enthusiasts. Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd Firearm At The Gun Shop, we prioritize quality and trust, sourcing only from reputable manufacturers to ensure compliance with federal and state regulations. The Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd is built for consistent performance, offering reliability in demanding environments. Whether you’re a seasoned shooter or new to firearms, this product delivers exceptional value, backed by our expert support and commitment to excellence. Choose The Gun Shop for a trusted AR-15 Rifles product that enhances your shooting precision and confidence. The Gun Shop is committed to providing expertly curated AR-15 Rifles products, ensuring compliance with all applicable laws, including ATF regulations. Our team’s deep knowledge of firearms and accessories ensures you receive a product that meets your expectations for quality and performance. Trust The Gun Shop for a seamless purchasing experience, from selection to delivery, with a focus on customer satisfaction and regulatory adherence.

Frequently Asked Questions

What are the shipping options for the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd?

At The Gun Shop, the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd is eligible for Express and Standard shipping options. Due to federal regulations for AR-15 Rifles products, we ship to your chosen FFL dealer for transfer. Shipping times and costs vary by location—check details at checkout for accurate information.

What is the return policy for the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd?

The Gun Shop offers a 30-day return policy for the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd. If unsatisfied, return it in original condition for a refund or exchange, subject to federal firearm regulations. Contact our support team for detailed instructions and assistance.

Why choose the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd from The Gun Shop?

Choosing the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd from The Gun Shop ensures a high-quality AR-15 Rifles product backed by our expertise and commitment to customer satisfaction. We offer competitive pricing, fast shipping to your FFL dealer, and a reliable return policy, making us a trusted choice for firearm enthusiasts.

How does the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd perform in AR-15 Rifles applications?

The Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd excels in AR-15 Rifles applications, offering superior craftsmanship and reliability. Whether used for competitive shooting, hunting, or personal defense, it delivers consistent performance trusted by shooters at The Gun Shop.

How should I maintain the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd?

Maintaining the Sig Sauer M400 SDI 5.56x45mm, 11.5" Threaded Barrel, Black, M-Lok Handguard, 30rd is simple with proper cleaning and storage. Follow the manufacturer’s care instructions for this AR-15 Rifles product to ensure optimal performance and longevity, keeping it ready for your next shooting session.