ehobby, ebbanned, other Asian retailers, or Canadian retailers for mags.
That's probably a overstatement of FPS. If it's working fine it's either going to fail soon due to the extra stress or it's not shooting that hot.
Suppressors should be bought from within Canada (you should be able to find them through "regular" channels) as customs doesn't really like suppressors.
Do yourself a favour and downgrade the spring to an M120 at most, preferably an M110 or M100 to take the stress off the gun.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE