DealThe M400 TREAD rifle is an optics ready, aluminum receiver rifle. The TREAD rifle features a 16 Nitride Coated barrel with a free-floating M-LOK handguard, a single-stage polished/hard-coat trigger, ambidextrous controls, and is available in 5.56 NATO. from AIM Surplus (Product F1SIGRM40016BTRD) |