Home / Accessory-Silencer Accessories / Gemtech THREAD PROTECTOR M13.5X1 LH View cart “Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24” 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 Gemtech ADAPTER S&W M&P22C/22LR $6200 Sale! SilencerCo 3-LUG MUZZLE DEVICE 9MM 5/8X24 $8900 Original price was: $8900.$8211Current price is: $8211. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 $7495 Original price was: $7495.$7135Current price is: $7135. Sale! Dead Air Armament WOLVERINE INSERT 15MM RH HK $8900 Original price was: $8900.$7865Current price is: $7865.