The Maxim Defense MKIV-SD isn’t just another suppressed Ruger® Mark IV™—it’s a leap forward in suppressed firearm technology. Powered by M-Kore™ Technology, this platform delivers unmatched precision, quiet operation, and reliability. Inspired by the iconic MP5SD, the MKIV-SD features a diffuser and ported barrel that bleed gas to reduce supersonic rounds to subsonic speeds, making it one of the quietest and most versatile suppressor systems available.

Its innovative 3-piece design includes integrated carbon cutters for effortless maintenance, while the user-serviceable suppressor ensures long-term durability and convenience. Built for seamless performance, the MKIV-SD eliminates detectable first-round pop and is available in three configurations: without an optic, or equipped with the Leupold DeltaPoint Pro® or Vortex Defender-ST™ red dot optics. Each option enhances the shooting experience, ensuring maximum performance for tactical professionals and enthusiasts alike.