Yes, the TLR-2 will fit the CZ P-10 S.
No, the Streamlight TLR-2G LED Rail-Mounted Tactical Light requires a picatinny accessory rail to be mounted to a firearm. Since the Ruger MKII does not utilize an accessory rail, you would not be able to install this light.
No, the Ruger MK1 does not possess an underside accessory rail which is required to mount this Streamlight TLR-2G LED Rail-Mounted Tactical Light.
Yes, the Streamlight TLR-2G LED Rail-Mounted Tactical Light will fit and function as intended with an FN FNX-9 pistol.
The Streamlight TLR-2G LED Rail-Mounted Tactical Light will work on a Ruger 5.7.
The Streamlight TLR-2G LED Rail-Mounted Tactical Light mounts to picatinny accessory rails. So it can mount to an older Sig P226 if it has a picatinny accessory rail.
Yes, the Streamlight TLR-2G LED Rail-Mounted Tactical Light will work on a Glock 19 Gen 4 and Gen5.
Yes. The Streamlight TLR-2G will fit and function on a Sig P220.
To fit the TLR-2G on your USP, you will need the adaptor by Streamlight. MPN:39085. I will link the adaptor needed below.
https://www.opticsplanet.com/streamlight-hk-usp-full-size-adapter-69085.html
Yes. The Streamlight TLR-2G will fit on a Glock 40 using the provided GL (standard) Key from Streamlight.