Help ID .50bmg bullet

Help to understand the type of bullet.
Cartridge 12.7 x99. Silver tip. Case is Canadian - IVI 05.
Perhaps this is a bullet Nammo NM 173 type???
Copper jacket, Steel hardened core, steel pallet, plastic jacket around the core. Incendiary composition in the head
Thank you in advance

It appears to be the NAMMO AP-S NM185.

From one of their flyers:

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Thank you very much, EOD!!!
If it is AP-S bullet then what does it mean S?

AP-S: Armor Piercing - Super

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Very nice sectioning work.