Sig Sauer M400 .223 REM/5.56 NATO

The Sig Sauer M400 X-Series is designed to deliver out-of-the-box performance for range use, training, and defensive applications. The platform brings a combination of practical ergonomics and upgraded components to shooters seeking a ready-to-use modern sporting rifle. This configuration is chambered for .223 Rem/5.56 NATO and is optimized for consistent operation.

The rifle pairs a 16-inch chrome moly steel barrel with a free-floating 15-inch M-LOK handguard to provide accessory mounting options while maintaining a slim profile and comfortable handling. The build incorporates a 7075 T-6 anodized aluminum receiver set and a Magpul SL-K six-position telescoping stock for familiar AR-style ergonomics. Controls include ambidextrous manual safety and fully ambidextrous bolt catch and magazine release on the X-Series lower.

Key Specifications

• The barrel length is 16 inches.
• The cartridge is .223 REM/5.56 NATO.
• The barrel description is 16" Chrome Moly Steel.
• The handguards are 15" Free-Float M-LOK.
• The stock type is a Magpul MOE SL with a 6 position Magpul SL-K adjustment.
• The capacity is 30 rounds with 1 x 30-round magazine included.
• The action is Semi-Auto.
• The trigger is a Sig Flatblade Match trigger.
• The muzzle device is a Hybrid Compensator/Flash Hider.
• The finish is Anodized with a Black FNC barrel finish.

The Sig Sauer M400 X-Series balances upgraded components and practical features for a reliable modern sporting rifle. Buy the Sig Sauer M400 .223 REM/5.56 NATO online today for a versatile rifle built for range use, training, and duty-focused applications.