Home / Accessory-Silencer Accessories / Rugged Suppressors OBSIDIAN PISTON .578X28 View cart “Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24” has been added to your cart. Sale! Rugged Suppressors OBSIDIAN PISTON .578X28$8000 $7196 Out of stock SKU: OP001 Category: Accessory-Silencer Accessories Product ID: 30006 Description Description 17-4 Stainless Steel Related products Sale! Dead Air Armament KEYMO FLASH HIDER M14X1LH $8900 $8472 Sale! SIG SAUER FLASH HIDER CL 5.56MM 90 DEG $17999 $16957 Sale! Rugged Suppressors OBSIDIAN45 3 LUG ADAPT 9/16X24 $8500 $7561 Sale! Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH $7495 $7135