The M400 TREAD is easily customizable with a full line of purpose-built 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 free-floating M-LOK hand-guard, a single-stage polished hard-coat trigger, ambidextrous controls, a Magpul SL-K 6 position telescoping stock and a mid-length gas system. This model is Colorado compliant.