I bought an old HW80 for a hundred quid.
Polished all the internals to a mirror shine, drilled in delrin buttons to the front and rear of the piston, fitted an fac V-mach service kit, sized the piston seal and tuned the trigger.
Stuck a parker hale mod on the end and added a little weight to the stock.
Total cost £200
Makes 19fpe, super fast lock time and althought it kicks it has no muzzle bounce.
When i put in the practise it shoots accurate and i kill rabbits concidently to 40 yards with a nice flat tragectory, but only after putting in a bit of range time.
Love that gun and after 3