Home / Accessory-Silencer Accessories / Rugged Suppressors OBSIDIAN FIXED MOUNT .578×28 View cart “Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH” has been added to your cart. Sale! Rugged Suppressors OBSIDIAN FIXED MOUNT .578×28$8000 $7196 Out of stock SKU: OF007 Category: Accessory-Silencer Accessories Product ID: 30000 Description Description .578X28Designed for Fixed Barrels Related products Sale! Rugged Suppressors TITANIUM FRONT CAP 7.62 $10000 $8715 Sale! Rugged Suppressors R3 FLASH HIDER 3/4X24 $10000 $8715 SilencerCo DELTA 1/2X28 THREAD SPACER $1900 Sale! Dead Air Armament WOLVERINE INSERT 15MM RH HK $8900 $7865