Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID 9/16-24 You cannot add "SIG SAUER MUZZLE BRK CL 5.56MM 25 DEG" to the cart because the product is out of stock. 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 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP 16X1LH $7495 $7135 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 $7495 $7135 Gemtech THREAD PROTECTOR 1/2-28 RF $1800 Sale! Dead Air Armament KEYMO FLASH HIDER M14X1LH $8900 $8472