I just purchased this gun and quite honestly I am confused about all the different names that Springfield uses for all their 1911's. My question is about the sights that are on this gun , it has a fiber optic front and black U notch rear. Will Trijicon Straight Eight night sights fit on this , Springfield Web page only gives minimal information about the gun it doesn't really go into depth detail. It is hard to find the differences between the models. Looking for information on you tube is confusing also their seems to be a lot of Loaded models that have been made but are not being made now. What is the difference between Loaded and TRP models ? Sorry about all the questions , but I am new to Springfield 1911's. Thanks , a new user.