Please Note :  Orders may take 5-7 Business days to ship outDue to the COVID-19 virus impact on the workplace and overwhelming order volume. We will email you shipping & tracking updates once shipped. New Inventory is arriving daily but moving very quickly.

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

Price: $899.00
MANUFACTURER: Springfield Armory
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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 Information

PLEASE NOTE: If you live in a magazine restricted state we remove the hi cap mag and will be glad to substitute with a 10 round mag IF AVAILABLE. If a 10 round mag is not available we will remove the hi cap magazine from the shipment. We cannot ship prohibited magazines to out of state addresses. There will be no substitutions or discounts offered for removal of mags.

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.


 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 - 

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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