I have another question:
what gas is use for pistol?
I heard people here use green gas
and i cant find top gas here...
is green gas = top gas?

green gas is propane with silicon already mixed in. Almost everyone in Canada uses propane rather than green gas or others. It's much cheaper. Compare $20 for green gas vs. $5 for propane and you get more too.

Thanks
but where can I get it?

Canadian Tires. It's the Coleman Propane tanks for outdoor burners. You'll also need a propane adapter too. You can pick up an AI one from Airsoftparts.ca

thanks
I will try later when i get the propane and adaptor

You can use gasket sealer to seal leaks if its coming from the bottom of the mag. The reseal mags can ofter perform BETTER than new since they can retain more gas and recoil harder!

Top gas = Red Gas = HFC 22 (A gas that's supposedly supposed to be phased out/banned by 2030) It has higher pressures than Propane at 20 Deg(C)

Green Gas (sometimes goes by the name "Girl Fart" I think it was Tru or PK that invented this term) = Propane = 1 lb. Coleman propane tank + propane adaptor + 2 drops 100% pure silicone oil (10 or 15 wt. RC shock oil) per ever 4 or 5 mags.

Pressures are as follows:

HFC-22 = ~130 psi at 20 Deg(C)
Propane = ~110 psi at 20 Deg(C)

SO if you use "Top gas"/Red gas in a pistol that's not rated for it you're getting higher pressures and as such higher chance of breaking thing due to increased wear.

Hope this helps..... If the above didn't make sense, don't be a sucker and pay for green gas, pick up a propane adaptor for like $20 or w/e, some silicone oil from your local RC shop, and go to CT and buy a 1lb propane bottle (any manufacturer is fine, all propane is the same just some add differing amounts of "bitterant" to their mix which is why some smell really nasty and others the smell isn't as strong but you can tell that there's a propane leak coming from somewhere).

I didn't know that. I've always been told Green Gas has more psi than Top Gas. Thanks for the confirmation.

One notable fact of green gas versus propane that I'm surprised no one mentioned is the safety factor. Green gas cylinders don't have any relief valves so there have been cases where they've been left in the back of a truck or similar on a hot sunny day and actually exploded.

Sure green gas is slightly more convenient since you don't have to add your own silicone oil or buy a propane adapter, but it's far too much more for that convenience and is unsafe to boot.