Home / Accessory-Silencer Accessories / Gemtech ADAPTER UMAREX RIFLES Sale! Gemtech ADAPTER UMAREX RIFLES$4500 Original price was: $4500.$4183Current price is: $4183. Out of stock SKU: 12211 Category: Accessory-Silencer Accessories Product ID: 26747 Description Description M8X.75 to 1/2-28 Adapter Related products SilencerCo O-RING BOOSTER PACK $900 Gemtech THREAD PROTECTOR 1/2-28 RF $1800 Sale! SIG SAUER FLASH HIDER CL 5.56MM 90 DEG $17999 Original price was: $17999.$16957Current price is: $16957. Sale! Dead Air Armament WOLVERINE INSERT 15MM RH HK $8900 Original price was: $8900.$7865Current price is: $7865.