Sig Sauer M400 SDI XSERIES | Semi-automatic Rifle | AR | 223 Remington/5.56 NATO | 16" Carbon Steel Barrel | Anodized Finish | Black | Magpul SL Stock | SIG Flatblade Match Trigger Low Profile Gas Block With Mid-Length System | 30 Rounds | 1 Mag

The M400 SDI X Series is the out of the box performance solution. The X Series features a 16"" chrome molly barrel with a free-floating M-LOK handguard, SIG Flatblade Match Trigger, ambidextrous bolt catch and release, Magpul SL stock, and mid-length gas system. KEY FEATURES: Ambidextrous Bolt Catch and Release | Low Profile Gas Block with Mid-Length System | SIG Flatblade Match Trigger | Hybrid Compensator/Flash Hider | Magpul SL Stock