The Viridian X5L Gen 3 Weapon Camera/Laser/Light is not compatible with the Hellcat Pro OSP. It is too large for the accessory rail on the Hellcat Pro.
The Viridian X5L Gen 3 Weapon Camera/Laser/Light will mount to a variety of handgun accessory rails including the Glock 19X and Glock 23.
To fit the Viridian X5L Gen 3 Weapon Camera/Laser/Light on your MK57 you will need a picatinny rail adaptor. Your pistol uses MLOK and would be able to mount a 5 slot adaptor to allow the Light to fit directly to that. I will link a Picatinny rail adaptor below:
https://www.opticsplanet.com/trybe-defense-magnite-m-lok-picatinny-rail-section-3-slots.html?_iv_length=2-dot-224-in
No. The Viridian X5L Gen 3 Weapon Camera/Laser/Light requires a full size picatinny rail to properly mount to a handgun. The Taurus G3C uses a much smaller rail that would not accommodate this light.
It should, yes. On the Viridian site they say it is compatible with rifles. It also has a 2 year warranty.
Yes, it will work with the SAR 9.
Yes, it will.
This laser/light/camera will fit most holsters that fit the TLR-1 light.
Mounted to a Springfield XDM with a 4.5" barrel, it will look just like the product photos mounted to the Glock - flush with the barrel. The Glock in the photos is a Glock 17 which also has a 4.5" barrel, so it should be a good visual comparison.
Yes, it absolutely will. The product photos of it mounted on a Glock are actually mounted to a Glock 17.