Sig Sauer M400-SDi X 5.56 Nato Rifle with FDE Cerakote Finish
- Item Number: RM400-SDI-16B-FDE
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- Condition: NEW
Special Promotion
Buy this firearm from Sportsman's Outdoor Superstore and receive this additional item free.
Buy a select Sig Sauer firearm and receive a $150 Sportsman's Outdoor Superstore gift card. Gift card is emailed 30 days after purchase.
Offer valid on orders placed between Aug 17, 2026 and Oct 31, 2026 while supplies last. Free items are void where prohibited by law. No substitutions. Click here for more details
This promotion cannot be combined with any other combo deal or offer that includes the same product(s). Sportsman's Outdoor Superstore reserves the right to change or modify this promotion at any time. Offer only valid on items shipped and sold by Sportsman's Outdoor Superstore at the listed price. It does not apply to the same item sold by other sellers labelled as a "Marketplace Deal". If any of the products or content related to this offer are returned, your refund will equal the amount you paid for the product or content, less the full retail value of any product or content related to this offer that is not returned, subject to applicable refund policies.
SPORTSMANS OUTDOOR SUPERSTORE $150 GIFT CARD (EMAILED 30 DAYS AFTER PURCHASE)
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Product Description
What's in the Box
- Sig Sauer M400-SDi X 5.56 Nato Rifle
- (1) 30 Round Magazine
- Owner's Manual
The M400-SDI X has been developed with the input from the professional instructors at SIG SAUER Academy. Building upon their decades of experience and countless hours of instruction, we have developed the M400-SDI X 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 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 utilizes the highest quality performance coatings to ensure maximum durability and reliability.
Firearm Features
- FDE Cerakote Finish
- Ambidextrous Bolt Catch and Release
- Compensator/Flash Hider
- Dual Clamp Handguard Locking System for Reduced Deflection
- Low-Profile Gas Block with Mid-Length Gas System
- SIG 2-Stage Matchlite Duo Trigger
- Magpul SL Stock
Firearm Specifications
- Manufacturer: Sig Sauer
- Model: M400-SDI X
- Caliber: 5.56 Nato
- Barrel Length: 16" Threaded
- Overall Length: 33.25"-36.5"
- Twist Rate: 1:7"
- Finish: FDE Cerakote
- Sights: None; Optic Ready; Picatinny Rail
- Grips: Reduced Angle
- Stock: Magpul BSL Pistol Stabilizing Brace
- Magazine Capacity: 30+1
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