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 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 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.

• Ambidextrous Bolt Catch and Release
• Low Profile Gas Block with Mid-Length System
• SIG 2-Stage Matchlite Duo Trigger
• Hybrid Compensator/Flash Hider
• Magpul SL Stock
• Flat Dark Earth Cerakote Finish

Sig Sauer M400, SDI, Semi-automatic Rifle, AR, 223 Remington/556NATO, 16" Cold Hammer Forged Steel Barrel, Cerakote Finish, Flat Dark Earth, Magpul SL Stock, Sig 2-Stage Matchlite Duo Trigger, Low Profile Gas Block with Mid-Length Gas System, 30 Rounds, 1 Magazine RM400-SDI-16B-FDE