Maxim Defense Industries Ruger MKIV-SD .22 LR 5.9 Barrel 10-Rounds

Overview

Maxim Defense MKIV-SD Features The Maxim Defense MKIV-SD is built around M-Kore Technology which uses a ported barrel and gas diffusion system inspired by the iconic MP5SD to bleed pressure ahead of the muzzle slowing supersonic rounds to subsonic velocities before they exit the suppressor and eliminating the first-round pop that plagues conventional suppressor designs. Average measured sound levels of 114 dB with Gemtech subsonic ammunition and 123 dB with CCI MiniMag ammunition per MILSTD-1474D make the MKIV-SD one of the quietest suppressed rimfire pistols ever measured while the gas management system simultaneously reduces felt recoil muzzle flash and improves accuracy compared to an unsuppressed host. The integral suppressor adds just 5.4 inches to the muzzle of the host Ruger Mark IV and brings the overall package length to 12.6 inches maintaining a compact and well-balanced profile that handles like a standard target pistol. The MKIV-SD features a fully user-serviceable 3-piece suppressor design that disassembles with common hand tools and includes integrated carbon cutters in the MonoKore baffle system for easy tube cleaning without the need for specialized brushes or solvents. A secondary retention mechanism on the suppressor tube ensures the assembly remains secure during sustained fire without any loosening or shifting that could affect point of impact or zero. Constructed from 7075-T6 aluminum and 4140 stainless steel with a Cerakote and Type III hard coat anodized finish the MKIV-SD delivers military-grade material quality and long-term corrosion resistance that matches the durability demands of sustained suppressed rimfire use. The included Vortex Defender-ST 1x 3 MOA red dot ships mounted and ready to run on the MKIV-SD platform delivering a bright and precise aiming point with up to 9 500 hours of battery life in a waterproof aluminum housing that pairs seamlessly with the suppressed and low-profile aesthetic of the MKIV-SD system. The Ruger Mark IV platform underneath the MKIV-SD integral suppressor system brings the proven push-button one-touch takedown ambidextrous manual safety and 1911-style grip angle ergonomics that make the Mark IV the gold standard in .22 LR rimfire pistols. Together the MKIV-SD system and Defender-ST optic deliver a purpose-matched factory-configured hearing-safe and optics-ready rimfire package that is ready to run the moment it is transferred. Maxim Defense MKIV-SD Specifications Manufacturer: Maxim Defense Model: MKIV-SD Caliber: .22 LR Action: Semi-Auto Barrel Length: 5.95 Suppressor Length: 7 Suppressor Outer Diameter: 1.0 Overall Length: 12.6 Thread Pitch: 1/2x28 Capacity: 10+1 Material: 7075-T6 Aluminum 4140 Stainless Steel Finish: Cerakote Type III Hard Coat Anodize Suppressor Design: MonoKore 3-Piece User-Serviceable Sound Level: 114 dB Avg. Subsonic 123 dB Avg. Supersonic per MILSTD-1474D Grips: Black Synthetic Optic Included: Vortex Defender-ST 1x 3 MOA Red Dot NFA Item: Yes Vortex Defender-ST Magnification: 1x Dot Size: 3 MOA Housing: Aluminum Weight: 0.95 oz. Battery Life: Up to 9 500 hrs. Mounting: Glock MOS Picatinny Proofing: Waterproof