Home / Accessory-Silencer Accessories / Gemtech THREAD PROTECTOR .578-28 Gemtech THREAD PROTECTOR .578-28$3000 Only 2 left in stock Gemtech THREAD PROTECTOR .578-28 quantity Add to cart SKU: 12224 Category: Accessory-Silencer Accessories Product ID: 41271 Description Description .578-28 Thread Protector Related products Gemtech GM9 THREAD REAR MOUNT M18X1RH $9100 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 $7495 Original price was: $7495.$7135Current price is: $7135. Gemtech ADAPTER S&W M&P22C/22LR $6200 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP 16X1LH $7495 Original price was: $7495.$7135Current price is: $7135.