ok thank you for the help but I had one more problem I added it the the game and dont know where to start by: "add "null = execVM "\ATA_xm25\scripts\ATA_Hud_Start.sqf";" to init in mission to make the airburst/scope work.
Set Interface Size to Large in Video Options" part. Am I adding it to the mission or another type of file? Yeah I am confused because I am new to adding weapons to the game and this is the first weapon that I wanted to put inside my game.