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  • Sig Sauer M400 Tread AR-15 Rifle- RM400-16B-TRD

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    Sig Sauer M400 Tread Rifle Features

    • Model RM400-16B-TRD
    • UPC 798681597765
    • 5.56 NATO
    • Mid length gas system
    • Semi auto
    • 16" stainless steel barrel
    • M-LOK rail
    • Magpul 6 position collapsible stock
    • Single stage trigger
    • 1-30 round magazine

    The M400 Tread from Sig Sauer features a 16” barrel rifled with a 1:8 twist and can be ambidextrously operated. The Tread M400 AR-15 comes with a 6 position collapsible carbine stock. This is important when you have different shooters with differing LOP or length of pull from the trigger to the end of the stock.This rifle features a mid-length gas system, 3 prong flash hider and amidextrous controls. 

    The free-floating M-LOK handguard and thirty round magazine capacity makes this AR-15 a classic either for the new shooter or the veteran. 

    Optic NOT included

    Important Magazine Information

    Atlantic Firearms follows all state regulations regarding the sale of high capacity magazines. Due to multiple states and cities now enforcing various magazine restrictions and more coming we will not ship magazines that are restricted in your area with firearms to the states listed below. If the mag that comes with the firearm is not legal in your state or city the magazine will be removed from the shipment. We do not offer custom magazine requests to swap out, ship to another state, refund, pinning of mag, substitutions, dealer approval or other. Hopefully we will see changes to these laws and violations to our second amendment rights. We apologize for this but we simply cannot accommodate each and every magazine request with over 30 different laws, regulations and restrictions impacting states, cities and local jurisdictions throughout the country. It is the customers responsibility to be informed of your local laws prior to completing your purchase. Atlantic Firearms is not responsible for any issues that may arise with magazines shipped to you or your FFL dealer that may not be legal in your area due to a change in current laws.

    It is your responsibility to be familiar with your current local gun laws BEFORE placing your order. Please feel free to email us with questions you may have.

    By placing an order with Atlantic Firearms you are acknowledging and agreeing to all Terms and Conditions outlined in the Terms And Conditions section.

    Please see our High Capacity Magazine Policy HERE.


     WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to - www.P65Warnings.ca.gov 

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    Atlantic Firearms,llc
    10337 Bunting Road
    Bishopville, MD 21813
    Office: (410) 352-5183
    Voice: (410) 352-5183
    Fax: (410) 352-3374