The new patent pending M.I.T.E.R. System™ is the world's first Adjustable-Zero™ fast-attach silencer mounting system. This revolutionary mounting system is designed to offer the operator the choice of instantly choosing between silenced or unsuppressed firing, while also providing the ability to adjust zero-shift. The M.I.T.E.R. System™ Blackout™ flash eliminator provides reliable precision accuracy and the ability of installation or removal of the silencer in seconds in the harshest military environment. The over-the-barrel design has minimal affect of the weapon's center of balance and maneuverability. The extreme durability of the SPR/M4 & SCAR-H SD is maximized by CNC automated fusion welding of every high-temperature aerospace alloy component used in its construction- making 100% suppressed fire possible. The back-pressure lowering design of the silencer aids in shooter comfort, reduces weapon fouling, and minimizes cyclic rate increase. As a final step, tapered-bore EDM technology is utilized to ensure precise bore alignment resulting in enhanced accuracy and maximum performance. By removing approximately 97% of the muzzle report, the SPR/M4 eliminates the need for ear protection, preserves field communications, and masks the location of the shooter. Eliminating muzzle signature in combat saves lives.