Sig Sauer M400 DH4 chambered in 5.56 NATO / .223. This is a premium AR-15 platform rifle designed for reliability, accuracy, and modern performance right out of the box. The M400 DH4 comes equipped with a free-floating M-LOK handguard that provides a lightweight feel and plenty of space for accessories, along with a durable, high-quality finish built to handle hard use. It features a flat-top upper receiver for easy optic mounting and a comfortable, ergonomic setup that makes it easy to shoot and control. The rifle includes an upgraded trigger for a smoother, more consistent pull compared to standard mil-spec triggers, and its overall balance makes it ideal for both range use and defensive applications.