Home / Accessory-Silencer Accessories / Gemtech ADAPTER MM9 5/8-24 300BLK View cart “Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24” has been added to your cart. Gemtech ADAPTER MM9 5/8-24 300BLK$7500 Out of stock SKU: 12175 Category: Accessory-Silencer Accessories Product ID: 31234 Description Description Subsonic ammo onlyFixed Threadmount Related products Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28 $7495 Original price was: $7495.$7135Current price is: $7135. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 $7495 Original price was: $7495.$7135Current price is: $7135. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP 16X1LH $7495 Original price was: $7495.$7135Current price is: $7135. Sale! Dead Air Armament HUB DIRECT THRD MNT 5/8X24SIG $8900 Original price was: $8900.$8351Current price is: $8351.