M16 trigger frame help
I have an m16 style trigger frame. It's the original metal frame with composite grips that can be unscrewed to allow for the 45 and m16 styles. However, I can't figure out how to remove the rack from the m16 grip. I'm looking at the diagram and it appears to be removable. If anybody can tell me how to do it or if it's even possible please let me know. Thanks.