Doesn't fit franklin armory, mil-spec lower. - XTS Extended Bolt Assisted Releases

Doesn't fit Franklin Armory, mil-spec, lower. The relief, cut on the inside of the front plate, is not large enough. With the back plate in place, the front plate will not mate with the back plate. Therefore, the screw threads won't engage the back plate, threads properly. If tried, the back plate threads would more than likely be stripped. The only options are to return the item or use a rotary tool to enlarge the relief.