Home / Accessory-Silencer Accessories / Gemtech ADAPTER GM-45/BLACKSIDE 578-28 Sale! Gemtech ADAPTER GM-45/BLACKSIDE 578-28$8500 Original price was: $8500.$8444Current price is: $8444. Out of stock SKU: 12192 Category: Accessory-Silencer Accessories Product ID: 33856 Description Description For GM-45 SilencerRear Thread Adapter Related products Sale! Dead Air Armament XENO MOUNT FLASH HIDER 5/8X24 $8900 Original price was: $8900.$8472Current price is: $8472. Sale! Dead Air Armament XENO MOUNT FLASH HIDER 1/2X28 $8900 Original price was: $8900.$8472Current price is: $8472. Gemtech THREAD PROTECTOR 1/2-28 RF # $1800 Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 Original price was: $6900.$6042Current price is: $6042.