The M400-TREAD Pistol features a free-floating M-LOK enhanced handguard that is lightweight yet rigid for extreme control and ease of mounting accessories such as lights and handstops. The lower receiver has an ambidextrous safety for right or left-handed operation and includes an integrated QD mount for easy sling attachment. Chambered in 5.56 NATO the M400-TREAD Pistol has a 11.5 Cold hammer forged steel barrel offering extreme durability and corrosion resistance while improving accuracy. The barrel is also fitted with a 3-prong flash hider and has an extremely versatile 1:7 twist rate. The M400-TREAD Pistol also has a carbine gas system offering smoother operation and reduced recoil. The new M400-TREAD Pistol includes a SIG Matchlite 2-stage trigger for enhanced control and improved accuracy. The new M400-TREAD Pistol. All of the freedom all of the features with none of the compromises.