Well, I just copied the information from the Westjet website; see below:
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Firearms and ammunition:
While WestJet accepts firearms for scheduled flights within Canada and to/from the United States, regulations differ for some of our international destinations.
Effective March 11, 2019, a handling fee of $50 CAD/USD for firearms.
Although some guidance is provided below for firearm and ammunition restrictions and embargos to/from some of our international destinations, this information may change or new restrictions/embargos may be introduced. Please be sure to contact the country of your destination for the most up to date information.
You are responsible for ensuring that all necessary permissions, documentation and other requirements have been obtained or satisfied before travelling. WestJet accepts no liability in the event that your weapon is denied entry or is confiscated upon entry. Please contact your destination's consulate for further information.
Firearms are restricted on flights to or from:
Bermuda (BDA)
Port of Spain, Trinidad and Tobago (POS)
Mexico (this includes any Mexican city that WestJet-operated aircraft, or our airline partners, fly to)
Each firearm item will be considered a piece of your checked baggage allowance.
All applicable checked baggage fees will be charged.
Firearms acceptance criteria
Firearms are permitted ONLY in checked baggage, and ONLY if the firearm is:
Unloaded (declaration must be signed);
Packaged in a locked, heavy-duty container or hard-sided (opaque) gun case;
Restricted firearms must be locked with either a cable lock or trigger lock;
Non-restricted firearms such as hunting rifles and shotguns do not require a cable or trigger lock.
WestJet will accept the following types of firearms:
Shotguns
Handguns
BB guns
Starter pistols
Rifles
Air pistols
Paintball guns (Please note: carbon dioxide cartridges/tanks for paintball guns will only be accepted if empty, with the valve secured in the open position. Please see restricted items for more details.)
Ammunition must be:
Securely packaged and packed separately from the firearm, however it is permitted to be transported within the same container.
Carried in sturdy baggage not weighing more than 5 kg (11 lb.) gross weight per person (excluding ammunition with explosive or incendiary projectiles)
Packaged in the manufacturer's original container or an equivalent sturdy, durable container that provides sufficient cartridge separation
Tasers and stun guns
Tasers and stun guns are prohibited for transport
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It says that "each firearm item will be considered a piece of your checked baggage allowance"... It does not say "each firearm"; I would take take to mean $50 per case, not $50 per firearm. In any case, as previously mentioned by others, those new fees do not sit well with me at all. On the other hand, I recognize that travelling with firearm means extra work for Westjet, i.e. complete form, apply tag, etc. But that is not worth $50 per firearm item in my opinion...