Sig Sauer M400 Pro 16" 5.56mm Rifle - Sig Sauer Professional Program

In stock
as of 06/13/2024 5:39AM CST
Store Inventory
Available Online3
Fountain Valley, CAOut of stock
The Colony, TX3
SKU: SG-WRM400-556N-16B-PRO
MPN: WRM400-556N-16B-PRO
UPC: 798681654857

Please check your local/state laws prior to ordering
Purchases limited to official Law Enforcement Officers and eligible participants only.

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.

SIG Sauer Professional Program
This discounted model is available to eligible qualified individuals only.

Eligibility: The SIG Professional Program is available to the below qualified individuals with approved purchaser ID:
• Active-duty military with an active-duty identification
• Retired military with retired military credentials
• Honorably discharged veterans (requires DD214 or Veteran designation on state-issued ID)
• Active reservists with military identification
• Active national guard with military identification
• Corrections officer (including parole and probation officers)
• Sworn law enforcement officers (including federal, state, and county)
• Retired law enforcement officers with “retired” credentials
• Active or retired law enforcement with official agency credentials
• Court officers with official agency credentials or official documentation
• State / County / City Coroners with official agency credentials or official documentation
• Full time first responders with current credentials or official documentation
• EMT’s, Firefighters, Volunteer Firefighters, and Paramedics.

The Sig Sauer M400 PRO offers a solid foundation straight out of the box. The M400 PRO comes with a free float MLOK handguard, 6 position stock, ambidextrous controls and enhanced SIG trigger for excellent accuracy. 

Caliber 5.56 NATO
Capacity *30 Rounds
Barrel Length 16"
Stock Telescopic
Barrel Carbon Steel
Trigger Standard Curved
Length 36.5"
Handguard Free Float, Aluminum, M-LOK Compatible
Twist Rate 1:7
Muzzle Device Flash Hider, 1/2-28
Receiver Finish Hard Coat Anodized
Grip Polymer
Height 7.5"
Safety Ambidextrous
Operating System Direct Impingement
Weight 6.5 lbs

*Specifications subject to change without notice.

* Magazine(s) are not included for Restricted States.

Please check your local/state laws prior to ordering

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