No, it does not.
Bushnell does not currently offer caps for this optic and there is not enough mounting space for aftermarket caps.
This is a clear bright dot without starburst.
This optic dose not have an auto off feature.
Per Bushnell, all of their Red Dot Sights have a One Year Limited Warranty. You can review more information about the available warranty for this item at https://www.bushnell.com/warranty/, under the "One Year Limited Warranty" option.
The Bushnell AR Optics TRS-26 Red Dot Sight does not have a shake awake feature.
Yes, the Bushnell AR Optics TRS-26 Red Dot Sight will mount to the flattop rail of your VR80 and function as intended.
The Bushnell AR Optics TRS-26 Red Dot Sight is designed for use on AR platforms. It will not fit a Glock 17. The links below will take you to some pistol red dots.
https://www.opticsplanet.com/vortex-viper-red-dot-6-moa-sight.html
https://www.opticsplanet.com/holosun-hs507c-x2-red-dot-sights.html
https://www.opticsplanet.com/trijicon-3-25-adj-red-rmr-type-2.html
The mount is designed for lower 1/3 co-witness with AR iron sights, so it is around a 1.57" base to optical center mount.
This optic is meant for the rifle/long gun platform.