My apologies if this has been asked before, I couldn't find any mention of it. Does the lump/bump on the bottom of the trigger guard serve any purpose ? It almost looks as though it has a recess, like something is supposed to snap on there. I'd rather have the bottom of the trigger guard smooth, and was going to remove it, but was wondering if it would leave a hole. Seems that HP wouldn't have gone to the trouble to put them on there if there wasn't some function they provide. Thanks.