Looks like an AH-1G eaite" dressiarly model with the "double-barrel" chin turret (7.62 minigun and 40 MM "chunker" automatic grenade launcher).
That would be an AH-1P (AH-1S Prod) used a the hydraulic turret from the G. Armament would as above plus 2.75" rockets and TOW missiles.It als would have the toilet bowl exhaust, not installed in photo.