SIG SAUER, Inc.'s M400 TREAD Pistol is a premium entry-level rifle-caliber pistol, that’s fully compatible with existing TREAD branded accessories. The M400 TREAD pistol is an optics ready ...

The M400 TREAD is an optics ready, aluminum frame rifle that features a 16” stainless steel barrel with a free-floating M-LOK handguard, a single-stage polished/hard-coat trigger, ambidextrous ...

According to the gun blog The Truth About Guns, Sig brought back the Sig M400 Tread and the M400 SDI ... circa 2012 by a ...