SIG SAUER Rolls Out the M400 Carbine | Outdoor Channel
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SIG SAUER Rolls Out the M400 Carbine

Introducing an improved version of current carbine


From Down Range TV

SIG SAUER, Inc., the leading manufacturer of commercial, law enforcement and military firearms, introduces an improved version of the current 5.56x45mm military issue centerfire tactical carbine, the SIG M400™.

The SIG M400™ has been introduced for consumers who prefer the direct impingement gas system and have an inventory of parts and accessories for the original M4-style carbine. Built with SIG SAUER® quality and reliability, the SIG M400™ is also an exceptional value for those seeking an AR-platform rifle.

To increase accuracy over mil-spec carbines, the SIG M400™ features a tensioning device designed into the lower receiver that ensures a tight lockup and eliminates accuracy-robbing play between the upper and lower receivers. The lower receiver has all the same features as the SIG 516™ such as an ambidextrous magazine release and rear quick-detach sling mount. Both receivers are machined from 7075-T6 aircraft-grade aluminum forgings and coated with a durable phosphate finish.

The upper receiver features an integrated MIL-STD 1913 accessory top rail for mounting optics and accepts most M16/AR15-style furniture. A six-position collapsible polymer stock offers adjustability to fit all shooters. An Enhanced version of the SIG M400 features all Magpul® furniture.

Chambered in 5.56 NATO, the SIG M400™ will be available in semi-automatic for commercial users. Three-round burst or fully automatic versions will be made available for military and law enforcement. Built to full military specifications, the SIG M400™ features a 16″ chrome moly steel barrel with a chrome-lined chamber and bore. A direct-gas impingement system operates a seven-lug, rotating bolt. The muzzle is threaded ½ x 28 TPI to accept a variety of flash hiders, compensators or suppressor mounts. An M16A2 flash compensator is included.

A removable sight assembly and carry handle, 30-round magazine and hard case are standard features on this rifle.

About SIG SAUER, Inc.
SIG SAUER, Inc. is the largest member of a worldwide business group of firearms manufacturers that includes J.P. Sauer & Sohn and Blaser GmbH in Germany and Swiss Arms AG in Switzerland. This global network of companies gives SIG SAUER a world-class firearms knowledge base, unparalleled design expertise, and extensive manufacturing capacity, enabling the company to respond quickly and effectively to changing market conditions and the needs of its military, law enforcement, and commercial markets worldwide. SIG SAUER is an ISO 9001: 2008 certified company with over 400 employees. For more information on SIG SAUER, any of its products, or the SIG SAUER Academy, log on to

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