I have done it.... Grab any Optic model and Use a Hex editor to change the name of the optic PAA file in the model to yours... The Optic model file is a very small file and quite easy to see where the PAA file is (It is in text). Leave the main two PAA's alone... these are called data\zasleh3_front.01.paa o\guns\pistole_muska.paa . (for pistol) You could even try using Notepad... yes notepad. As the names and locations of the PAA files are in text they are very easy to find amongst the other non-text data. Just scroll to near the end of the folder and rename it to your new PAA... Make your PAA a transperant with a size. of 512 x 256. eg black shape of gun. I will try doing another using notepad this time...
Intel Core i7 980X EXTREME, 24 Gig RAM, 240 Gig Revo x 2 SSD, 2 X EVGA (SC) 680GTX's, Win 7 64 Pro,
Single 27 inch Monitor, Oculus Rift V 1.0, Track IR 5, HOTAS Warthog, SIMPEDS Pedals..Arma3 Ready... not....