Home / Accessory-Silencer Accessories / Rugged Suppressors OBSIDIAN FIXED MOUNT .578×28 View cart “Gemtech GM9 THREAD REAR MOUNT M18X1RH” 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 Gemtech GM9 THREAD REAR MOUNT M18X1RH $9100 Sale! Rugged Suppressors R3 FLASH HIDER 3/4X24 $10000 $8715 Sale! Dead Air Armament XENO MOUNT FLASH HIDER 5/8X24 $8900 $8472 Sale! Rugged Suppressors OBSIDIAN PISTON 9/16×24 $8000 $7196