Abh mod/Bioenergetic Beam
The Bioenergetic Beam was introduced in 0.4.3. It's originally a 360 degree weapon but was nerfed to ease its use by players. It also struggled with game engine beam bugs and non-support by the game.
The bioenergetic beam is powerful internal weapon. It requires the tech level specific control room. It requires batteries. It has two firing modes: beam and pulse shot.
Simply place it. No extra care is needed other than direction shown by the firing arc in blue print mode.