First Look: SIG Sauer M400 Tread Snakebite SE Rifle

SIG Sauer's new M400 Tread Snakebite SE rifle is released.

posted on August 21, 2021
SIG Sauer Tread Snakebite rifle

AR pattern rifles have become America’s most popular rifle due, in part, to their almost limitless ability to be upgraded. From changing out barrels and triggers to new stocks and handguards, If you can think of it, chances are, the modular nature of the AR rifle can make it happen. This, however, can be confusing for some buyers, which is why the Tread line from SIG Sauer has some of the most-desired features in an AR platform gun, without any of the added frills. The Tread is available in a both an AR-10 pattern gun, chambered in 7.62 NATO and an AR-15 style rifle chambered in 5.56 NATO.

Now the new Tread Snakebite SE offers the same features of the standard Tread Snakebite model, such as ambidextrous controls and a free-floating barrel with M-Lok fore-end, along with other added upgrades. Just like all Tread models, the Snakebite SE works with the complete line of Tread accessories.

These upgrades include a unique combination flash hider and compensator that provides minimal flash and reduced muzzle rise and a two stage Matchlite trigger for an ultralight trigger pull for increased accuracy. In addition to this, the receivers and barrels are Cerakote finished to offer maximum protection and minimal wear.


Tread Snakebite Specifications

Caliber: 5.56 NATO
Barrel Length: 16 inches
Magazine: One 30 round polymer magazine
Magazine Type: AR-15
Action Type: Direct-gas-impingement semi-automatic
Stock Type: 6-Position SL-K
Barrel Material: Stainless Steel
Trigger Type: 2-Stage match
Twist Rate: 1:7-inch
Fore-end Type: Alloy
Grip Type: Polymer
Receiver Finish: Hard-coat anodized
Overall Length: 35.5 inches
Overall Width: 2.5 inches
Height: 7.5 inches
Accessory Rail: M-Lok
Weight: 7 pounds


For more information on the Tread Snakebite AR-15 and other products from Sig Sauer, please visit


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