Home / Accessory-Silencer Accessories / Gemtech PISTON GM9/MM9/TUNDRA 13.5X1LH Gemtech PISTON GM9/MM9/TUNDRA 13.5X1LH$8000 Only 2 left in stock Gemtech PISTON GM9/MM9/TUNDRA 13.5X1LH quantity Add to cart SKU: 12171 Category: Accessory-Silencer Accessories Product ID: 33859 Description Description For Tundra or Multimount LID Fits Sig Sauer MPX Related products Gemtech ADAPTER MM9 FTM 1/2-28 $7500 Gemtech GM9 THREAD REAR MOUNT M18X1RH $9100 Gemtech THREAD PROTECTOR 1/2-28 RF # $1800 Sale! Dead Air Armament HUB DIRECT THRD MNT M18X1.5 AI $8900 Original price was: $8900.$8351Current price is: $8351.