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. Link to HiTec Arms on my Campsite Page below.
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