(RM400-16B-TRD) **FREE SHIPPING** This is a new Sig Sauer M400 Tread and is chambered in 223/5.56. Features a free-floating M-LOK handguard, Magpul SL-K 6-position telescoping stock, single stage trigger, 16" stainless steel barre, & a 7075 T-6 aluminum receiver with a black hardcoat anodized finish. Comes with 1 factory 30 round magazine, original box, & manual.