All the options on this page are the RM07 models, so these all have 6.5 MOA dots as well as manual and auto adjusting LED brightness.
I dropped my fiber optic version right at the top corner when it was mounted to my fnx 45 tactical on concrete. I didn't even shift zero.
No, P229 Legion RXP and RX models are optic cut for optics that use the Deltapoint Pro footprint. The Trijicon RMR uses the RMR footprint. You would be able to direct fit optics such as the Leupold Deltapoint Pro, Sig Romeo 1 Pro, Holosun SCS-320, Vortex Defender ST/XL & more.
The Trijicon RM07 RMR Type 2 does not include an optic cover. We do carry the Strike Industries Removable Transparent Jellyfish Cover, and the OpticGard Trijicon RMR Scope Cover. Both options can be found by using the links below:
https://www.opticsplanet.com/strike-industries-removeable-transparent-jellyfish-cover-for-trijicon-rmr.html
https://www.opticsplanet.com/opticgard-trijicon-rmr-scope-cover.html
The Trijicon RMR Type 2 6.5 MOA Adjustable LED Reflex Sight is not compatible with an H&K VP9 without the use of an adapter plate. You will need to use the Evolution Gun Works Trijicon RMR Sight Mount, found by using the link below:
https://www.opticsplanet.com/evolution-gun-works-trijicon-rmr-sight-mount-1-780-in-aluminum.html
The Sig P320 XCarry Spectre has a slide cut to fit the RMR as well as other red dots using different footprints. So you should not need a mounting plate for the Trijicon RMR Type 2 6.5 MOA Adjustable Red Dot Sight.
If you want to mount a Trijicon RMR Type 2 6.5 MOA Adjustable Red Dot Sight do a Glock 20 you will need to use a dovetail mounting plate. The mounting plate listed at the link below will for mounting the Trijicon RMR Type 2 6.5 MOA Adjustable Red Dot Sight to a Glock 20.
https://www.opticsplanet.com/evolution-gun-works-trijicon-rmr-sight-mount-1-780-in-aluminum.html?_iv_gun-make=glock
The Trijicon RMR Type 2 6.5 MOA Adjustable Red Dot Sight would be a great option for the FN 509.
Unfortunately, the RMR Type 2 will not fit without modification to the slide.
To mount the Trijicon RMR Type 2 6.5 MOA Adjustable Red Dot Sight to your particular gun I believe you would need to use this adapter plate here:
https://www.opticsplanet.com/evolution-gun-works-trijicon-rmr-sight-mount-1-780-in-aluminum.html?_iv_gun-make=sig-sauer-1&_iv_code=KK-RMT-TRJRMR-49518