Sig Sauer M400 SDI XSeries 5.56mm 16" Rifle, Black - CA

In stock
as of 05/20/2024 11:19PM CST
Store Inventory
Available Online3
Fountain Valley, CAOut of stock
The Colony, TX3

CA-Legal Fixed Magazine Rifle, includes 10 round magazine. Click Here for more information.

Inter-Store Transfer

If this item is out of stock at your local RifleGear but available at our other location, no problem. Just place your order and select In-Store Pickup as the shipping method. As long as the item is legal in your location, we will transfer the item for you. You will be notified by email once your item has arrived at the destination.

The SIG M400 SDI XSeries was developed with the input from professional instructors at SIG Sauer Academy.  Building off decades and countless hours of instruction, the M400 XSeries was made to meet the highest standards of performance and reliability.

The M400 XSeries features fully ambidextrous controls including a bolt catch/release unique to the M400 SDI lower receiver. A free floating handguard uses a new steel lockup design for reduced deflection for maximum rigidity. The 2-stage Matchlite Duo trigger provides a crisp 4.5-6.5 lb pull weight with a flat bow design. A chrome lined barrel and performance coatings ensure maximum durability and reliability.

Caliber 5.56 NATO
Operation Direct Impingement
Capacity *10 Rounds
Barrel Length 16"
Barrel Type Chromoly, Chrome-Lined
Twist 1:7
Muzzle Hybrid Compensating Flash Hider
Trigger SIG Flat Blade Match
Forend Alloy, Free Float, M-LOK
Lower Receiver Ambidextrous
Stock Magpul SL
Grip Polymer
Overall Length 33.5"
Width 2.8"
Height 7.5"
Weight 7 lbs

CA-Legal Fixed Magazine Rifle, includes 10 round magazine. Click Here for more information.

Important note about our photos
While we make every effort to ensure that our product photos are accurate, manufacturers occasionally change the design of components such as triggers, sights, or magazines without notice. Also, modifications to the firearm or component may be required in order to meet specific state compliance requirements. While we make every effort to accurately describe and illustrate the item you are going to receive, there may be visual differences on various components that do not affect functionality.

Federal law requires that you be 21 years of age or older to purchase a handgun, frame or receiver. To purchase a shotgun or rifle, you must be 18 years of age or older. 18 U.S.C. Section 922(b)(1).

As required by federal law, this item may only be shipped to a dealer with a valid Federal Firearms License. If you do not specify the name and shipping address of your dealer, your order will be delayed.
 Click here for more information on buying a gun online.  

California Residents
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to


Customer Reviews

(0.00)stars out of 5
# of Ratings: 0