Removing factory mossberg sights ??

[Bobby5]

 I bought some new williams sights for my 835 and im having a hell of time getting the factory rear sight off. it just looks like its a clamp on style.I just slid the front sight off the end of the barrel but the rear is stuck idk if somebody glued it or what. Whats the best way to ge them off without messing up the camo finish? thanks a ton

[Brs2427]

They just clip on the rib slide a flat screwdriver under the end and pop them off