Would it be uncommon to find an original condition "as rebuilt by RIA" Colt 1911 RIA marked rebuild in the 340,000 serial number range with an arched 1911A1 mainspring housing and long 1911A1 grip safety ? All parts match with the light grayish RIA parkerizing . It also still has the original type long 1911 trigger and 1911A1 grips . The RIA marking appears to have been stamped after the refinish . I have seen many arsenal rebuilt 1911 pistols , but all still had the flat mainspring housing and the short grip safety . Opinions and photos if possible would be much appreciated . THANKS !