I was working on my map super gim survival but I had an idea what if I made it so that sentry could fall randomly and break some blocks and respawn at the top of the map for later like a meteor system. (this is in platformer mode btw)
You could do that if you want. You would need a barrier on top of a teleporter. So when you deactivate it the sentry will get teleported to the top of the map.
Did it work?
So what youre trying to do is have a sabotoge system with the sentry?
If so heres my idea, to follow off the coolerthancoolest’s idea, have a barrier to hold the sentry at the top of the map. De-activate it to drop the “Meteor” and have a zone hooked up to a damager to knockout the sentry, at the bottom of the map. Set the sentry to Respawn —> Yes, Respawn time, 1 second to have it back. set the damager to, when damaged using device transmit on channel, (because wires are not memory efficient), and re-activate the barrier on that channel.
sorry for the lack of pictures, I can try to get them if you would like. 
will it break dynamic dirt?
If you put the sentry on a team opposite the player, the sentry will try to hit the player, and if the player dodges, it is likely the shots will hit the dirt breaking it, to be safe I’d give the sentry a gadget with range, like the P.M.L, Evil eye, slingshot, or quantum portal depending on the number of blocks you want to break.
i will try it great idea
Glad I could help. 