SIG Sauer M400-SDI X FDE 5.56 NATO 16" 30-Round Rifle

The M400-SDI X has been developed with the input from the professional instructors at SIG Sauer® Academy. Building upon their decades of experience and countless hours of instruction, SIG has developed the M400-SDI X to meet the highest standards of performance and reliability.

With fully ambidextrous controls including a bolt catch/and release unique to the M400-SDI lower-receiver, the M400-SDI X delivers advanced performance for both left and right-handed shooters and makes transitional shooting easier than ever. The free-floating handguard utilizes a new steel lockup design that significantly reduces handguard deflection by providing maximum rigidity and allows for accessories to be attached on all four sides with no effect on accuracy. A 2-Stage Matchlite Duo trigger provides an out-of-the-box crisp 4.5-6.5 lb. pull weight with a flat blade design for a precision feel. The M400-SDI X utilizes the highest quality performance coatings to ensure maximum durability and reliability.

• Magpul BSL pistol stabilizing brace FDE stock
• Reduced angle grip
• M-LOK® FDE forend
• Dual clamp handguard locking system for reduced deflection
• Chrome/Moly steel barrel
• FDE Cerakote® finish on receiver
• Optics ready
• Low-profile gas block with mid-length gas system
• Compensating flash hider for reduced muzzle rise and flash
• SIG 2-stage Matchlite Duo trigger
• Flat trigger
• Fully ambidextrous controls (bolt catch/release, safety selector, charging handle, mag catch)
• One 30-round polymer magazine included
• Threads: 1/2 in-28 tpi tapered shoulder
• Twist: 1:7"
• Dimensions: 36.5"L x 2.75"W x 7.1"H
• Collapsed length: 33.25"
• Weight: 7 lbs.