I want to change the trigger assy on my DD. To do so I have to get the pistol grip off amd so on. I have the new style pistol grip on the lower reciever. At the bottom of the pistol grip has what looks to be either a sticker or maybe a cover. It was all factory installed and I like the look. Well, before I go prying on it an screwing it up whats the best way to remove it so I can remove the pistol grip?