Scopes and Ammo in Perth ON are a good place to start
Flat top piston adjust to just under 500fps.I have a 2289 14" barrel ,steel breach,FT piston,American valve and shoulder stock.
be aware that a modded airgun can be a hot potato.
for a factory one, the lab takes the manufacturer's velocity as is is written
rumor on the airgun forums say a modded one could be tested with light pellets and found to be over 500fps
food for thought
I guess it would all depend on how many times you pumped it. If that is the case, the RCMP could make any pumper illegal if they chose to use light pellets.
Canada Shooting Supply is another great place.




























