If you have a standard PVS-14 J-Arm this will be compatible with it.
These units are Gen 3 PVS-14's with Pinnacle tubes which are some of the highest quality offerings available on the market.
ALL standard PVS-14 mounts will work with this night vision unit to mount it to a helmet.
The unit has manual gain.
Gen 3 Pinnacle tubes are cream of the crop units with some of the best low light performance available. A general rule to go by is if the manufacturer refers to the unit as "Pinnacle", you are paying for the best intensifier tube available.
Yes, every PVS-14 unit I've ever seen from reliable companies come with a small built-in IR illuminator.
This unit is thin filmed.
Yes, it is.
No it does not, you'll need to buy a rail adapter, this night vision uses the same thread pattern and size as a camera so mounting it with a camera mount would work as well, but not recommended
It can be mounted to a picatinny with any PVS-14 picatinny mount. Here is a link to a compatible model:
https://www.opticsplanet.com/atn-weapons-mount-6015-pvs14-acmppvsxwm01.html