HiTec Arms SD Suppressor – Extreme Sound Suppression0 by Roy Wells2024-08-122024-08-12 Overview of the HiTec Arms SD Suppressor. This suppressor works on the MP5SD, B&T SD’s, BRT CAR 15 SD, or anything threaded 18×1. It is 12 inches long, 1.5 inches OD, and weighs 16oz. This suppressor will make supersonic 9mm sound like a mouse fart. HR9SD,MP5SD,Suppressors 1 month ago/ 21 views You may also like Broad River Tactical CAR 15 SD – Integrally Suppressed HiTec Arms Suppressor 26 views HR9SD,Suppressors Caleb Downing is showing off a new project 46 views HR9SD,Suppressors HiTec Arms SD Suppressor Demo 88 views HR9SD,Suppressors MP5SD Cleaning Tutorial 46 views MP5SD Forgotten Weapons – Honey Badger vs MP5SD 75 views MP5SD Forgotten Weapons – BRT-HTA 125 views HR9SD HR9SD DB 166 views HR9SD HR9 Integrally Suppressed Upper 160 views HR9SD