In 0.5 space and below, sentry guns have a maximum range of 150km from the protected object. In 0.6 space and above, they monitor a range no less than 150 km from the object being guarded. However, Concord has boosted key sentries to have a much greater range. No details regarding maximum sentry range in secure space are to be made available to prevent outlaws from carrying out raids in secure space.

It is still 150km

actually you are wrong, it works like this: (prepare for a wall of text)

Sentry guns have un limited range!!!!
Lets say you are in a 0.4 system with 5 gates.
You attack someone on gate A.
Then those sentry guns will start shooting you.
However the sentry guns at gate B,C,D,E will also start shooting you, there ammo will go into sort of warp and hit you at gate A.
And if you think warping away will save you, then no sir!
Even in warp the sentry guns will be able to hit you.
And once you do survive the 60 second timer, and can dock up.
The sentry guns are able to rip right through the station into your hangar and hot your ship.
Wich is pretty cool actually, since now in captains quarters, you can stand next to your ship and see the impacts
Anyway, i am glad i could enlighten you here and hope you can use it to your advantage.

actually you are wrong, it works like this: (prepare for a wall of text)

Sentry guns have un limited range!!!!
Lets say you are in a 0.4 system with 5 gates.
You attack someone on gate A.
Then those sentry guns will start shooting you.
However the sentry guns at gate B,C,D,E will also start shooting you, there ammo will go into sort of warp and hit you at gate A.
And if you think warping away will save you, then no sir!
Even in warp the sentry guns will be able to hit you.
And once you do survive the 60 second timer, and can dock up.
The sentry guns are able to rip right through the station into your hangar and hot your ship.
Wich is pretty cool actually, since now in captains quarters, you can stand next to your ship and see the impacts
Anyway, i am glad i could enlighten you here and hope you can use it to your advantage.

actually you are wrong, it works like this: (prepare for a wall of text)

Sentry guns have un limited range!!!!
Lets say you are in a 0.4 system with 5 gates.
You attack someone on gate A.
Then those sentry guns will start shooting you.
However the sentry guns at gate B,C,D,E will also start shooting you, there ammo will go into sort of warp and hit you at gate A.
And if you think warping away will save you, then no sir!
Even in warp the sentry guns will be able to hit you.
And once you do survive the 60 second timer, and can dock up.
The sentry guns are able to rip right through the station into your hangar and hot your ship.
Wich is pretty cool actually, since now in captains quarters, you can stand next to your ship and see the impacts
Anyway, i am glad i could enlighten you here and hope you can use it to your advantage.

Your attempts at humor have failed as miserably as said ship in your story. #l2funny