Home / Accessory-Silencer Accessories / Rugged Suppressors OBSIDIAN FIXED MOUNT .578×28 You cannot add "Gemtech ADAPTER GM-45/BLACKSIDE 1/2-28" to the cart because the product is out of stock. 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 R3 FLASH HIDER M18X1 $10000 $8715 SilencerCo O-RING BOOSTER PACK $900 Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 $6042 Sale! SilencerCo 3-LUG MUZZLE DEVICE 9MM 1/2X36 $8900 $8211