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  1. K

    Hatsan Bt65 25 cal. O rings

    You should purchase all the seals for the rifle. And change every year or two if not damaged. You never know when a seal may go. Make a kit and keep it when hunting or out just shooting.
  2. K

    Hatsan Bt65 25 cal. O rings

    https://m.youtube.com/watch?v=L9G4ubMrR7U Just a few corrections. Probe seals are dash#009 is. 5.28mm x 1.78mm Barrel external seals are 8mm x 1.5mm 90 durometer is better than 70 especially if you remove barrel frequently for cleaning. Barrel support oring is 15mm x...