Refine Your Roller Locker. The stainless-steel SF® Ryder 9-MP5 is a duty-use suppressor designed for the H&K MP5 submachine gun. It attaches to any standard tri-lug barrel (and Navy barrels) via a proprietary Fast-Attach® system similar to what you’ll find on our legendary SOCOM suppressors. Extremely durable and highly effective at attenuating noise, its stainless steel baffles while its built-in spacers help prevent excessive carbon buildup. The SF Ryder 9-MP5 is easily disassembled for cleaning, and its baffles are indexed and numbered for easy reassembly. Unlike other sub-machine gun suppressors, it does not affect bullet performance or increase point of impact/point of aim. The SF Ryder 9-MP5 has a stellar reputation for durability, performance, and ease of maintenance. Your MP5 deserves nothing less.