In stock
Sig Sauer M400 Tread Snakebite .223 Rem/5.56 Semi-Automatic AR-15 Rifle, FDE - RM400-16B-TRD-SB
In stock

Sig Sauer M400 Tread Snakebite .223 Rem/5.56 Semi-Automatic AR-15 Rifle, FDE - RM400-16B-TRD-SB

Regular Price $1,299.99 Special Price $999.99
SKU 5655104064
Brand Sig Sauer
Model Number RM400-16B-TRD-SB
UPC 798681651726
Customers must read Compliance Information before purchasing.

Product Details


Platform: AR-15
Weight: 7 lb
Material: Polymer
Color: Flat Dark Earth
Length: 30.8"
Caliber: .223 Remington/5.56x45mm NATO
Action: Semi-Automatic
Firearm Type: Rifle
Magazine Capacity: 30
Barrel Length: 16"
Trigger Type: Single-Stage Polished/Hard Coated
Stock: 6-Position MOE
Magazines: 1
Twist Rate: 1:8"
Series/Collection: M400 Tread Sankebite
Barrel Material: Stainless Steel
Receiver Finish: Cerakote
Forend Type: Alloy
Operating System: Direct Impingement


The M400 TREAD is an aluminum frame rifle that is ready for range day. TREAD features a 16 inch stainless steel barrel with a free-floating M-LOK handguard, a single-stage polished/hard-coat trigger, ambidextrous controls, a Magpul 6 position telescoping stock, a mid-length gas system.

  • M-LOK handguard with lightening cuts to reduce weight
  • 3 chamber compensator
  • Ambidextrous charging handle made of aircraft-grade aluminum and a dual roll pin design
  • M-LOK front sight adapter with co-witness height made of lightweight aluminum


Q & A

Retail Stock


All NFA Rules Apply.
These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.
Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to (CA Health and Safety Code Section 25249.6).