i'm not the scripter of this mod i just edit a bit this one:

http://www.gtagarage.com/mods/show.php?id=13570



This change the ak47 attaching feature for the desert eagle and just work with this handgun

every gun has diferents offset that's means that the coors i set may not be exactly for all guns

you have to tweak some guns

how to in the "coordenates explanation.txt" file 



Have Fun :D