Hey guys and gals, I am lookingfor some help...I am looking to purchase a PS90 to stick in the back of my patrol car with my CAR-15...My agency requires us to qualify with the weapon with iron sights...after qualification we can use non magnified red dot sights,.....1st does the ps90 have true back up iron sights you can use???? 2nd is anyone out there using a tri-rail ps90 with iron sights?? if so what brand of sights??? finally is there any other L.E.O.'s using ps90's on duty??????