SIG Sauer M400 SDI X-Series 5.56x45 NATO 16" Threaded Semi-Auto Rifle

The SIG Sauer M400 SDI X-Series is a right-hand, semi-automatic AR-15 pattern rifle chambered in 5.56x45mm NATO and also compatible with .223 Remington ammunition. It is built for general shooting, training and range use.

The rifle has a 16-inch threaded barrel with a hybrid flash hider and compensator, an aluminum receiver with a black anodized finish, and a weight of about 7 pounds. Its optic-ready top rail is intended for mounted optics, and the lower receiver has fully ambidextrous controls including the bolt catch and release, selector switch, charging handle and magazine release. The package includes a SIG Flatblade 2-stage trigger, a Magpul SL telescoping stock, and a low-profile gas block with a mid-length gas system. The rifle ships with a 30-round magazine capacity.

• Action: Semi-Auto
• Calibers: 5.56x45mm NATO, .223 Remington
• Barrel Length: 16 inches, threaded
• Receiver: Aluminum
• Finish: Black anodized
• Weight: 7 lbs
• Capacity: 30 rounds
• Sights: Optic ready