The most ugly and unrealistic sounds in the game is the sound of a RPG-42, (shot and hit/explosion grenade) and the explosion of all hand grenade.
As I understand, the sound of Missile explosion in game only one.
As for the RPG and Titan weapon systems.
In the ARMA3 This sounds like from a children's animated film.
The sounds have nothing to do with real explosions or shot(

Real example for RPG-32 from real life:
http://www.youtube.com/watch?v=hTRwgRbVggY
http://www.youtube.com/watch?v=FelCYse2b0E

Real example for hand grenade:
http://www.youtube.com/watch?v=x10eF7JrDic

Please make powerful sounds of grenade-explosions and shots from RPG.

PS: I think in the Arma3 any sounds of Anti-tank missiles explosions (including NLAW, Titan), require correction.
These sounds have no power blast.
Please replace this sounds...