The M400-SDI X is meticulously engineered to deliver top-tier performance and reliability, crafted with insights from SIG SAUER Academy’s professional instructors. It features fully ambidextrous controls, including a unique bolt catch and release on the M400-SDI lower receiver, ensuring optimal performance for both left and right-handed shooters, enhancing transitional shooting ease. The free-floating handguard, equipped with a new steel lockup design, minimizes deflection and provides maximum rigidity, allowing accessory attachment on all sides without compromising accuracy. The 2-Stage Matchlite Duo trigger offers a precise 4.5 - 6.5lb pull weight with a flat blade design for a refined shooting experience. Built with premium performance coatings, the M400-SDI X guarantees exceptional durability and reliability. Additional features include an ambidextrous bolt catch and release, hybrid compensating flash hider, dual clamp handguard locking system to reduce deflection, low-profile gas block with a mid-length system, SIG flat blade match trigger, and Magpul SL stock. The M400 VTAC, another model in the M400 series, shares similar high standards of performance and versatility. The M400 SDI VTAC incorporates Viking Tactics’ tactical enhancements, offering similar high standards of performance and versatility tailored for rigorous tactical applications.