The only 'Monster Hunters' that have been featured on screen* in the setting before are PCs, Swiss Guard and Knights of Malta SOF teams from the Vatican,
Rangers from
the British conspiracy that must always exist to counterbalance a Catholic one and then the privately funded Monster Hunters of the PCs' Patron in the newest campaign, centenarian Texan billionaire J.R. Kessler.
All of these, to some extent, are willing to fight fire with fire, i.e. learn and use supernatural powers against supernatural threats. The Catholic Church perhaps allows the least latitude of any of the above when it comes to what kind of rituals and studies are permissable, with few allowed any but basic protective and defensive rituals, but their chosen champions absolutely wield enchanted and imbued weapons.
I was thinking that the Brazilian monster hunters were distinct in their utter rejection of magic and the paranormal as viable tools. In GURPS terms, they learn Occultism to go with Intelligence Analysis and Tactics, but Hidden Lore and Thaumatology skills are absolutely forbidden.
This is not purely paranoia, in that there is a very good argument to be made that a solid majority of mortals who engage in any way with the supernatural eventually end up insane, morally compromised or otherwise irrevocably damaged by their interaction with unearthly forces.
Even the PCs have to admit that all ritual magicians of any power they know are deeply odd at best, usually psychologically traumatized and that for every one student of the esoteric who tries his best to use magic to help others, there seem to be ten using it to get ahead in some criminal syndicate, sacrificing innocents to extend their lives, acting as the cats' paws of some awful entity or something similarly undesirable.
In any case, for monster hunters who have to maintain some degree of covertness, generally by simply pretending to be anti-drug or counter-terror tactical teams from the relevant Brazilian agencies, what would be good signature tactics, gear or other identifiers?
For example, the British Rangers associated with the 'Shadow Court' tend to use
various UK weaponry, historical and otherwise. The monster hunting teams financed by J.R. Kessler like to field firearms chambered in .45 caliber with custom-made Jacketed Hollow Point projectiles, where the oversized cavity is used to deliver substances that the target might be supernaturally vulnerable to. This includes .45 ACP pistols, .460 S&W revolvers, rifles in .450 Bushmaster and 45 Raptor (all can fire .452 inch bullets). Shotgun slugs with hollow cavities are obviously also useful for this.
What might the Brazilian monster hunters do to solve the same technical problem (how to deliver enough dosage of supernatural countermeasures through a ballistically useful projectiles) in some different way?
I was thinking that sintered silver and iron bullets, probably jacketed, might be fielded by the Brazilian teams when facing foes that might be vulnerable to either. That might be made in 9x19mm, 5.56x45mm and 7.62x51mm at the very least. I'm not sure how they'd deliver salt, special ash, hawthorn or more exotic payloads, however.
Of course, lacking the oracles, divination and other informational assistance that the supernatural can provide, the Brazilian teams will not as often know the exact weaknesses of their targets, so perhaps esoteric payload delivery is less of a requirement for them than the PCs, the Rangers from the UK or the Knights from the Vatican. The Brazilian teams might compensate with more firepower and ruthlessness.
*Many other individuals or groups dedicated to defending humanity or some part thereof from supernatural threats exist. PCs in prior campaigns have met individuals that might belong to other organizations, but if so, they know nothing of these mysterious organizations. Examples include an Indo-Iranian man dressed in Western clothing, whom the PCs determined (from linguistic clues and a carelessly revealed food taboo) to be Yazidi, and who asked that they call him Ishmael. Ishmael appeared to be some sort of monastic warrior, with limited experience of the wider world, but adequate English from books and TV, as well as esoteric martial arts or meditation-based mystical powers.
Other PCs have also met Iraqi Shia Muslims engaged in warfare against djinn-controlling Sufi mystics.