Adapter for Hatsan QE Big Bore M18x1

Custom made silencer adapter for Hatsan air rifles with M18x1 thread to attach your air gun silencer, and with M23x1 thread to fit the 26 mm O.D. shroud (including BullBoss).
Material is steel, blued. With thread protector. Through bore is 12 mm (0.427″) wide. Knurling pattern may be different than the one on the pictures.