Home / Accessory-Silencer Accessories / Gemtech THREAD PROTECTOR M13.5X1 LH View cart “Gemtech ADAPTER MM9 FTM 1/2-28” has been added to your cart. Gemtech THREAD PROTECTOR M13.5X1 LH$1800 Out of stock SKU: 12223 Category: Accessory-Silencer Accessories Product ID: 26732 Description Description M13.5X1 LH Thread Protector Related products SilencerCo DELTA 1/2X28 THREAD SPACER $1900 Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 Original price was: $6900.$6042Current price is: $6042. SilencerCo O-RING BOOSTER PACK $900 Sale! SIG SAUER MUZZLE BRK CL 7.62MM 90 DEG $17999 Original price was: $17999.$16957Current price is: $16957.