I was hoping that there would be a way to change the site for all the planes at once. Guess I'll just have to keep changing them one at a time. Thanks.
If all of them are currently already set/saved using the default gunsight, you can go into the gunsights folder and rename the current default to "default_old" (this way, you will still have the game's original default gunsight)
Then as you posted, make a copy of the US MK14 and name it default and copy/paste (save) it in the gunsight's folder....
Be aware that there may possibly be more than 1 file for a particular gunsight. Example: "US MK14.bmp" "US MK14.alpha" <-------something similar to this.....meaning that you will have to make sure that you are including all the necessary files need per gunsight, depending on their design
Hope I've explained it clear enough for you
bustr can give you a more detailed answer if you still need help.... Just send him a pm, if what Ive posted isn't enough to get you what you are looking for
Hope this helps
TC