[Djole1337]

Why don't you use OnPlayerKeyStateChange?

pawn Код:

#define PRESSED(%0) (((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))
public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(PRESSED(KEY_FIRE))
    {
        switch(GetPlayerWeapon(playerid))
        {
            case 35, 36, 38:
            {
                // do whatever you want.
            }
        }
    }
    return 1;
}