Yes, the Viridian X5L GEN2 Universal Green Laser Sight is compatible with the FN 510 MRD.
The Viridian X5L GEN2 Universal Green Laser Sight with Tactical Light is not compatible with any P365 Rose model pistols. My recommendation would be the Streamlight TLR-7 Sub (light only), or the Streamlight TLR8-Sub (light and laser). Both options are designed to fit the proprietary sig rail and can be found linked below:
https://www.opticsplanet.com/streamlight-69428-tlr-7-laser-light-combo-handgun-glock-led-500-lumens-black-alu.html?_iv_gun-model=sig-sauer-p365-1&_iv_code=SQ-FLW-69428-69401
https://www.opticsplanet.com/streamlight-tlr-8-g-sub-for-sig-p365-xl-led-weapon-light-w-green-laser.html
Yes, it will work on the rail of the CZ 75 SP-01.
Yes, it will fit a Sig P226 as long as it has an accessory rail.
The unit will mount to that rail, but it will stick out a lot past the end of the Sig P365.
Yes, it will fit a full size or compact version of the M&P .40. The barrel needs to be at least 4" long.
The unit is export controlled.
No, the Sig P365SAS does not have a standard accessory rail. You would need a light/laser unit that is made specifically for the Sig P365.
It will fit both the XD and Glock 20 as they have an accessory rail to mount to. It will not fit the Glock 27 as it does not have an accessory rail to mount to.
Yes, the holster must have the "ECR" feature to be able to use the instant on function. Viridian offers an ECR upgrade kit that allows you to retrofit any holster you own to have the ECR Instant on function. The upgrade kit can be found here:
https://www.opticsplanet.com/viridian-green-lasers-ecr-instant-on-holster-upgrade-kit.html
And more information regarding the ECR Instant On technology can be found here:
https://viridianweapontech.com/instant-on