My favorite 03 shooter is a parts conglomerate rifle. I used the parts I liked to build the rifle without regard to "match". It does what I want it to, and that is to put rounds in little circles at long ranges. I like it.
No 03/A3 is a "fencepost", and that includes yours. All that matters is that YOU like it. They are well designed and proven weapons of combat, and fun to shoot!
Jim