Sig Sauer M400 SDI XSeries Moss Green 5.56 / .223 Rem 16″ Barrel 30-Rounds

Sig Sauer M400 SDI XSeries Features

The M400 SDI XSeries is built with an aluminum M-LOK handguard, allowing for easy attachment of accessories while maintaining a lightweight design. The Sig 2-Stage Matchlite Duo trigger ensures a crisp, predictable break, improving precision for tactical, defensive, and sport shooting applications.

This rifle is optics-ready, featuring a flat-top upper receiver for customizable sighting options. The threaded barrel (1/2×28) allows for suppressor or muzzle device attachment, while the Sig Flash Hider Compensator helps reduce recoil and muzzle rise. The ambidextrous safety makes it versatile for both right- and left-handed shooters.

Sig Sauer M400 SDI XSeries Specifications

• Caliber: .223 Rem | 5.56 NATO
• Action: Semi-Auto
• Barrel Length: 16″
• Overall Length: 36.5″
• Twist Rate: 1-in-7″
• Capacity: 30+1 Rounds
• Magazine: 1 x 30-Round Polymer Mag
• Finish: Moss Green
• Stock: Collapsible / Folding (6-Position Magpul MOE-SL, Black)
• Sights: None (Optics Ready)
• Muzzle Device: Sig Flash Hider Compensator
• Thread Pattern: 1/2×28
• Safety: Ambidextrous
• Handguard: Aluminum M-LOK
• Trigger: Sig 2-Stage Matchlite Duo
• Weight: 7 lbs.