The M400 TREAD is easily customizable with a full line of purposebuilt accessories designed and built in the USA. The TREAD is an aluminum frame rifle that is optics ready TREAD features a 16 stainless steel barrel with a freefloating MLOK handguard a singlestage polished hardcoat trigger ambidextrous controls a Magpul fixed stock and a midlength gas system. This model is California compliant.