Home / Accessory-Silencer Accessories / Gemtech PISTON GM-45 LID MK23 You cannot add "Gemtech THREAD PROTECTOR M13.5X1 LH" to the cart because the product is out of stock. 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! Rugged Suppressors R3 FLASH HIDER 3/4X24 $10000 $8715 Gemtech GM9 THREAD REAR MOUNT M18X1RH $9100 SilencerCo O-RING BOOSTER PACK $900 SilencerCo DELTA 1/2X28 THREAD SPACER $1900