The SIG SAUER M400-FORGE Semi-Auto Rifle with ROMEO-MSR Gen II Red Dot is a modern sporting rifle for shooters who want an upgraded AR-15 that's ready right out of the box. At the heart of the rifle is a cold hammer-forged steel barrel and mid-length gas system that provides a smoother, more refined shooting experience than standard carbine-length systems while maintaining absolute reliability. Inside the forged receiver set is a TriggerTech 3.5-lb., 2-stage, flat-blade trigger that delivers a crisp, predictable break and quick reset that outperforms mil-spec triggers. A full-length, free-floating M-LOK handguard, ambidextrous charging handle, and Magpul SL-K adjustable stock provide modern ergonomics and adaptability for a wide range of real-world uses. Paired with the included ROMEO-MSR Gen II Red Dot with 2 MOA dot reticle, it provides fast target acquisition and precise shooting right out of the box. Cold hammer-forged steel barrel with A2 flash hider Mid-length gas system provides a smooth shooting experience TriggerTech 3.5-lb., 2-stage flat trigger Free-floating M-LOK handguard Ambidextrous charging handle Magpul SL-K adjustable stock Includes ROMEO-MSR Gen II Red Dot