As long as it stays non-restricted you can do whatever you want.
Non-restricted firearm: any rifle or shotgun that is neither restricted nor prohibited. Most common long guns are non-restricted, but there are exceptions.
Restricted firearm* means:
a handgun that is not a prohibited firearm,
a firearm that
is not a prohibited firearm,
has a barrel less than 470 mm in length, and
is capable of discharging centre-fire ammunition in a semi-automatic manner,
a firearm that is designed or adapted to be fired when reduced to a length of less than 660 mm by folding, telescoping or otherwise, or
a firearm of any other kind that is prescribed to be a restricted firearm in the Regulations Prescribing Certain Firearms and other Weapons, Components and Parts of Weapons, Accessories, Cartridge Magazines, Ammunition and Projectiles as Prohibited or Restricted.
Prohibited firearm* means:
a handgun that
has a barrel equal to or less than 105 mm in length, or
is designed or adapted to discharge a 25 or 32 calibre cartridge, but does not include any such handgun that is prescribed, where the handgun is for use in international sporting competitions governed by the rules of the International Shooting Union,
a firearm that is adapted from a rifle or shotgun, whether by sawing, cutting or any other alteration, and that, as so adapted,
is less than 660 mm in length, or
is 660 mm or greater in length and has a barrel less than 457 mm in length,
an automatic firearm, whether or not it has been altered to discharge only one projectile with one pressure of the trigger, or
any firearm that is prescribed to be a prohibited firearm in the Regulations Prescribing Certain Firearms and other Weapons, Components and Parts of Weapons, Accessories, Cartridge Magazines, Ammunition and Projectiles as Prohibited or Restricted.
*Criminal Code definitions