Looks like a para warthog but I thought the warthog had a bull barrel design with no bushing... strange...
That appears to be a P12-45 which predates the Warthawg in name, back then the Warthawg was the P10-45.
Para had the P10, P12, P13 and P14-45 in the .45ACP line up, there were different model names for the .40 and 9mm guns. The P10-40 / 16-40 / P18-9 being some of the other popular guns. IIRC there was also a 15-40 and 14-40 but they were few in number.
The older Paras were not Parakoted and were blued or stainless, had vertical cocking serrations instead of the new style grooves etc.
Para's product line seems to change rapidly, I don't see the Nite-Tac or railed Hawg listed on their website any more and they don't offer half the models in other calibers than .45 that they used to.
It that's a P12, the extended bbl would put it right around 4" and assp2022 pointed out, in Canada there is a bbl length requirement, it very well could be a Canadian's gun that ended up state side...