Product Overview
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, we have 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 & 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. The 2-Stage Matchlite Duo trigger provides an out-of-the-box crisp 4.5 - 6.5lb 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.
Specifications
- SKU: RM400-SDI-16B-FDE
- Caliber: 5.56 NATO
- Sights: Optics Ready
- Barrel Length: 16 in (406.4 mm)
- Barrel Material: Chrome / Moly Steel
- Twist Rate: 1:7
- Thread Pattern: 1/2 in - 28 tpi (tapered shoulder)
- Muzzle Device: SIG Flash Hider-Compensator
- Action Type: Semi-Auto
- Operating System: Mid-Length Direct Impingement
- Stock Type: Magpul BSL Pistol Stabilizing Brace
- Grip Type: Reduced Angle
- Trigger Type: SIG 2-Stage Matchlite Duo
- Trigger Shape: Flat
- Manual Safety: Ambidextrous
- Forend Type: M-LOK FDE
- Accessory Rail: M-LOK / Picatinny
- Magazine Type: AR-15
- Magazines Included: (1) 30rd Polymer Mag
- Color: Flat Dark Earth (FDE)
- Receiver Finish: FDE Cerakote
- Overall Length: 36.5 in
- Collapsed Length: 33.25 in
- Folded Length: N/A
- Overall Width: 2.75 in
- Height: 7.1 in
- Weight: 7 lbs
- Forward Assist: Yes
