SIG Sauer M400: A Top-Selling Semi-Auto Carbine

by
posted on May 29, 2021
no-4-sig-sauer-m400.jpg

SIG Sauer’s M400 was the company’s first AR-15-style carbine. It caught enthusiasts largely by surprise at its introduction—roughly a decade ago—but it quickly became a popular choice in a market teaming with modern sporting rifles. The direct-gas impingement firearm was one of the top-selling semi-automatic rifles last year, thanks partly to its budget-friendly price point. The quality build and variety of upgrades over the original likely played a bigger role, though.

Today M400 models are part of SIG Sauer’s Tread line, which was introduced on Oct. 1, 2018. There are three versions available—the SIGM400 Tread, SIGM400 Tread Coil and SIGM400 Tread Predator. There’s also a fourth, but it’s a pistol variant (SIGM400 Tread Pistol).

All are chambered in 5.56x45 mm NATO, come with ambidextrous fire controls and a three-prong flash hider. Gas blocks are micro and mid-length. Their free-floating barrels are made from stainless steel and feature an M-LOK compatible aluminum handguard. Most come with a six-position Magpul SL-K stock, with state-complaint versions being the exception. Receivers have a Picatinny rail for optic mounting, barrels are 16” long and feature 1:8” rifling.  

Versions include the Predator version (seen above), which is new for 2021. It comes with a five-round polymer magazine and a precision stock adjustable for comb height and length-of-pull. The gun wears a Cerakote Elite Jungle finish, 15” M-LOK Predator handguard and weighs in at 7.5 lbs.

At 7 lbs. and 30.8” in length, the Coil models comes with a ROMEO5 red-dot sight installed, flat-blade Enhanced Trigger, fore-end pistol grip and 13” lightweight handguard. The SIGM400 Tread is the baseline model. Each ship with 30-round magazines—10 rounders for restrictive states.

Last year the SIGM400 ranked fourth on Gunbroker.com’s annual list of top-selling semi-automatic rifles. The position is determined by volume of purchases through FFLs using the services of the website.

SIG Sauer doesn’t list MSRPs on its website, probably a wise decision considering the current demand. However, prices at many major retailers are hovering somewhere around $1,000 depending on model.

 

 

Latest

The Armed Citizen
The Armed Citizen

The Armed Citizen® July 26, 2021

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Preview: Springfield Hellcat 15-Round Magazine

Do you have a hungry Hellcat? Check out this latest enhancement for Springfield Armory’s micro-compact pistol.

Straight-Pull Shooter: The Savage Impulse

Fast to operate, accurate on target and possessing a modular design that’s configurable for either right- or left-handed shooters, the Savage Impulse sets a new standard for affordability in the rarified realm of straight-pull rifles.

Friends of NRA Raises $1 Billion For The NRA Foundation

The Friends of NRA program, a grassroots support network, reached a significant milestone of $1 billion raised for the NRA Foundation.

At The Range: Ruger LCP MAX

American Rifleman staff take to the range the latest update in Ruger’s concealed carry lineup, a semi-automatic that offers lightweight, pocket-size security with increased capacity and improved functionality of original LCP designs.

Preview: Steiner TOR Fusion

A melding of the company’s TOR Torch light and TOR Mini laser lines, the aptly named Steiner TOR Fusion is a rail-mounted light/laser module with a number of advanced features.

Interests



Subscribe to the NRA American Rifleman newsletter