The M400 Tread pistol from Sig Sauer features an 11.5-inch nitride-coated, cold hammer-forged barrel with a factory-installed free-floating M-Lok handguard, single-stage polished trigger, ambidextrous controls, KAK Industry Shockwave Blade 2.0 brace and carbine-length gas system. It is available in 5.56 NATO and is fully compatible with existing Tread branded items including a three-chamber compensator, an ambidextrous charging handle made of aircraft grade aluminum, Romeo5...