Home / Accessory-Silencer Accessories / Gemtech THREAD PROTECTOR 1/2-28 RF View cart “SilencerCo O-RING BOOSTER PACK” has been added to your cart. Gemtech THREAD PROTECTOR 1/2-28 RF$1800 In stock Gemtech THREAD PROTECTOR 1/2-28 RF quantity Add to cart SKU: 12222 Category: Accessory-Silencer Accessories Product ID: 26738 Description Description 1/2-28 Thread Protector Related products Sale! Dead Air Armament HUB DIRECT THRD MNT 5/8X24SIG $8900 Original price was: $8900.$8351Current price is: $8351. Gemtech ADAPTER MM9 FTM 1/2-28 $7500 SilencerCo O-RING BOOSTER PACK $900 Sale! Dead Air Armament WOLVERINE INSERT 15MM RH HK $8900 Original price was: $8900.$7865Current price is: $7865.