All I want to know, is if some one on here knows for sure if milling the slide on my HK usp tactical .45 so it can accept a trijicon rmr is A) possible and B) Whether the firearm will remain safe and reliable. I have contacted at least a dozen smiths, and they all want me to send my pistol to them, so they can check it out. I don't want to waste money on shipping if it isn't possible. PLEASE HELP !!!