Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID MK23 View cart “Yankee Hill Machine Company SIDEWINDER PISTON 45ACP.578X28” has been added to your cart. Gemtech PISTON GM-45 LID MK23$14800 Out of stock SKU: 12190 Category: Accessory-Silencer Accessories Product ID: 26720 Description Description GM-45/Blackside PistonFits HK Mk 23 Pistols Related products Sale! SilencerCo 3-LUG MUZZLE DEVICE 9MM 1/2X36 $8900 $8211 Sale! Dead Air Armament KEYMO FLASH HIDER M14X1LH $8900 $8472 Sale! Dead Air Armament HUB DIRECT THRD MNT M18X1.5 AI $8900 $8351 Sale! SilencerCo BRAVO ANCHOR BRAKE 30CAL BLACK $9400 $8606