Just got my first 45acp. Its a Detonics CM serial C2082X. Reciever looks brushed, slide looks polished. Is it carbon steel? What version - MKVI? Approx DOM? Is there good source for mags, springs, night sites? It says Seattle but I hear a lot of reference to Bellvue. Thank for your help. I posted on the yahoo group also but this forum seems to have more activity.