Hello to everyone,
i have sd map but there is one problem i can not solve

when i try to destroy flak gun at A, it explodes but it dont turns into destroyed model; same at B spot

Is there any way to make A and B flak guns visible only at SD?
I have added line script_gameobjectname - bombzone to destroyed model and to non-destroyed model, and this way in SD gametype model stays non-destroyed all the time even after explosion.

otherwise if i leave non-destroyed model without this line it shows up in dm, tdm, and other gametypes :(

Sounds to me like you answered your own questions, but I wonder if you need to add the game objective bit to all the pieces
of the prefab I assume you have used. I myself would use the bsp editor to look at what they did with a stock map.