You have it?
no, but i've certainly seen it. maybe it's on one or more of the [][][][] servers.
It's on ___'s mod, which afaik isn't currently available. Since the turret fired as much possible for every server frame it literally dealt around 800 dps iirc.
There's an easy fix for it but the modder didn't apply it and games became severely unbalanced whenever there's a blaster camper controlling a turret.
I'm not quite sure why it isn't popular though.
Iirc, there were other modifications such as being able to literally 'deconstruct' enemies, but deconstruction isn't lag-compensated so I remember struggling in a granger vs ckit match with 350 ping.