Sig Sauer Adds to TREAD Lineup

Sig Sauer M400 TREAD coil.

Sig Sauer just introduced the new M400 TREAD COIL to it’s expanding line of TREAD products. They say this new rifle 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.

Based on its predecessors, the M400 TREAD rifle, the 11” TREAD Pistol, and the 716i TREAD, the M400 TREAD COIL semi-auto rifle is chambered in 5.56 NATO and comes with a 30-round AR-15 type polymer magazine. The stock is a MAGPUL SL-K Telescoping Stock and an M-LOK accessory rail.

According to Sig, the M400 TREAD Coil is outfitted for out-of-the-box performance, fully configured with some of the top Tread accessories.

Tom Taylor, Chief Marketing Officer, and Executive Vice President, Commercial Sales said, “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 Specs:
• Overall Length: 30.8”
• Overall Height: 7.5”
• Overall Width: 2.5”
• Barrel Length: 16”
• Barrel Twist: 1:8”
• Weight (incl. magazine): 7lbs.

Additional TREAD accessories for this rifle include: a 3-chamber compensator; an ambidextrous charging handle made of aircraft-grade aluminum; flip-up front and rear iron sights that are easy to install, adjustable, and deploy quickly; an M-LOK front sight adapter with co-witness height made of lightweight aluminum; and multiple configurations of M-LOK grip kits made of high-strength polymer.

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 advises that the COIL and other TREAD accessories are now shipping and available in retail stores. Additionally, the full-line of TREAD accessories and TREAD branded apparel is available at

Find them on Instagram and Facebook.

Read more about Sig Sauer.

Leave a Reply