SIG SAUER Introduces M400 TREAD COIL Rifle

    (SIG Sauer)

    SIG Sauer has just announced the M400 TREAD COIL, a new and enhanced version of their popular ready-out-of-the-box TREAD series of rifles. SIG Sauer describes the new rifle as “a new standard of performance and value in the AR market”. The new TREAD COIL comes with a ROMEO5 TREAD red dot optic, a Matchlite Duo trigger, and a lightweight performance 13” MLOK handguard. MSRP on the new rifle package is MSRP $1,099.99.

    Pete recently took a look at the TREAD COIL’s big brother, the TREAD 716i AR-10. Check that out here.

    M400 TREAD COIL (SIG Sauer)

    Here’s what SIG Sauer has to say about the new TREAD COIL:

    SIG SAUER, Inc. is pleased to introduce the M400 TREAD COIL to the expanding line of TREAD products. The M400 TREAD COIL is an enhanced version of the popular M400 TREAD Rifle with the most popular TREAD branded accessories including the ROMEO5 TREAD Red Dot sight, match trigger, lightweight handguard, and vertical foregrip that come factory installed.

    “The hallmark of the TREAD brand is combining innovation with value and offering consumers premium SIG SAUER products at an extremely affordable price point. Since its introduction, the demand for the TREAD brand has been phenomenal, and based on the popularity in the market, we have grown the brand from the base M400 TREAD rifle to include the 11” TREAD Pistol716i TREAD, and now the M400 TREAD COIL,” said Tom Taylor Chief Marketing Officer, and Executive Vice President, Commercial Sales. “Just like its predecessors, the M400 TREAD COIL combines innovation and value. This rifle is unique because it comes with a factory-installed red dot optic, making it ready to go right out of the box, along with other popular features that until now, were only available through an accessory purchase. The M400 TREAD COIL delivers the freedom to have an enhanced TREAD rifle right from the store with a very advantageous price that makes this an exceptional value to the consumer.”

    The M400 TREAD COIL is an aluminum frame rifle with a 16” stainless steel barrel featuring a factory-installed and zeroed ROMEO5 TREAD optic, a lightened free-float M-LOK™ 13” TREAD handguard, a TREAD Matchlite™ Duo trigger, TREAD vertical foregrip, telescoping stock, 3-prong flash hider, ambidextrous controls, and is chambered in 5.56 NATO.

    M400 TREAD COIL (SIG Sauer)

    M400 TREAD COIL Specs:
    • Overall Length: 30.8”
    • Overall Height: 7.5”
    • Overall Width: 2.5”
    • Barrel Length: 16”
    • Barrel Twist: 1:8”
    • Weight (incl. magazine): 7lbs.

    TREAD M-LOK Handguard (SIG Sauer)

    SIG Sauer has also lined up some additional TREAD accessories for the M400 TREAD COIL, these include a 3-chamber compensator; an ambidextrous aircraft-grade aluminum charging handle and multiple configurations of M-LOK grip kits made of high-strength polymer. See the list below for details:

    M400 TREAD Branded Accessories Specs:
    • M-LOK Handguard 10.5” $149.00
    • M-LOK Handguard 15” $149.00
    • Adjustable Flip-Up Sights $149.00
    • Ambidextrous Charging Handle $49.00
    • 3-Chamber Compensator $49.00
    • M-LOK Front Sight Adapter $29.00
    • M-LOK Hand Stop Kit $29.00

    SIG Sauer says the new M400 TREAD COIL and accessories are now shipping and available in retail stores and at You can check out TFBTV’s look at the TREAD system here and their look at the TREAD pistol here.

    Matthew Moss

    _________________________________________________________________________ – Managing Editor – Managing Editor

    Matt is a British historian specialising in small arms development and military history. He has written several books and for a variety of publications in both the US and UK. He also runs Historical Firearms, a blog that explores the history, development and use of firearms. Matt is also co-founder of The Armourer’s Bench, a video series on historically significant small arms.

    Here on TFB he covers product and current military small arms news.

    Reach Matt at: [email protected]