Home / Accessory-Silencer Accessories / Rugged Suppressors OBSIDIAN PISTON .578X28 View cart “Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH” 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 Gemtech ADAPTER MM9 FTM 1/2-28 $7500 Sale! Rugged Suppressors R3 FLASH HIDER M18X1 $10000 $8715 Sale! Gemtech ADAPTER SIG MOSQUITO $4500 $4183 Sale! Dead Air Armament HUB DIRECT THRD MNT M18X1.5 AI $8900 $8351