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Mfg Item #: SIG SRD-PISTON-578X28
Convert your SRD45 suppressor to a .578X28 Right Hand thread pitch with the SRD-PISTON-578X28. The piston is made of 17-4 heat treated stainless steel with a matte glass bead finish and it will fit a variety of hosts. Simply swap the conversion piston with the original piston in your suppressor to match your barrel thread pattern.