Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID 9/16-24 View cart “Gemtech THREAD PROTECTOR 1/2-28 RF” has been added to your cart. Gemtech PISTON GM-45 LID 9/16-24$14800 Out of stock SKU: 12187 Category: Accessory-Silencer Accessories Product ID: 31204 Description Description GM-45/Blackside Piston Related products Gemtech ADAPTER S&W M&P22C/22LR $6200 Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 $6042 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 $7495 $7135 Sale! Rugged Suppressors R3 FLASH HIDER 3/4X24 $10000 $8715