The SIG M400 TREAD in 5.56/.223 with a 16″ barrel and DH3 competition package blends practical range utility with competition-grade ergonomics. Finished in a durable gray Cerakote (factory finishes vary by model), this semi-automatic rifle features a 16″ free‑floated barrel for balanced velocity and controllability, an accessory‑ready M‑LOK handguard and full top rail for optics and attachments, plus a 30‑round magazine to keep you on target. The DH3 package brings an adjustable competition-style stock and enhanced controls for fast, repeatable handling—making the rifle equally at home on the match line, training sessions, or range duty. (Model-specific features such as stock, trigger, and thread pattern may vary by SKU — consult seller/manufacturer specs for exact configuration). Sig Sauer Firearms+1