Before you start, ensure you have a clean workspace and the following items:
: Many enthusiasts recommend upgrading from the factory seal to an aftermarket option like an , , or for better performance. HW90 Reseal
is a powerhouse in the air rifle world, famous for its unique . Unlike a standard spring-piston rifle, the HW90 uses pressurized air as its powerplant. While this makes for a smoother, more adjustable shot cycle, it also means that once those internal seals fail, your rifle becomes a very heavy paperweight. Before you start, ensure you have a clean