Sig Sauer M400 SDI X-Series 5.56 NATO Semi-Automatic Rifle with M-LOK Handguard
- Item Number: RM400-SDI-16B-P
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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-Series 5.56mm Semi-Automatic Rifle with M-LOK Handguard
- (1) 30-Round Magazine
- Owner's Manual
The SIG SAUER M400 SDI XSERIES packs a rich set of features and upgrades into the M400 platform delivering an advanced performance rifle right out of the box. The M400 XSERIES lower features fully ambidextrous controls, including bolt catch & release, selector switch, charging handle and mag release. Also unique to the XSERIES is a precision machined lightning cut upper and lower with a handguard clamp system designed to minimize deflection when using mounted accessories. Other features include a hybrid flash hider/compensator, 2-Stage Matchlite Trigger and Magpul SL Telescoping Stock.
Firearm Specifications
- Manufacturer: Sig Sauer
- Model: M400 SDI X-Series
- Caliber: 5.56mm NATO
- Barrel Length: 16"
- Overall Length: 33.5"
- Overall Width: 2.8
- Twist Rate: 1:7"
- Trigger Type: SIG Flat Blade Match
- Stock Type: Magpul SL Stock
- Barrel Material: Chrome / Moly Steel
- Operating System: Direct Impingement
- Weight: 7 lbs
- Magazine Capacity: 30 Rounds
- Accessory Rail: M-LOK
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