[Dayrion]

PHP код:

if(weapon < 0 || weapon > 46) return SCM(playerid,-1,"{f00f00}[ERROR]: {F00f00}Invalid WeaponID"); 


Also id between 19 & 21 are invalid:

PHP код:

IsValidWeapon(weaponid)
    return (0 <= weaponid <= 46) && !(19 <= weaponid <= 21) ? true : false; 


PHP код:

      SetPlayerArmour(playerid, 100);
       SetPlayerHealth(playerid, 100); 


It's better to write 100.0 since the parameter is a float. I know it's not very important but it's better to take a good habit.

PHP код:

new InEvent[MAX_PLAYERS]; //Checking player if he is in/out event.
new EventOpened[MAX_PLAYERS]; //Checking if Event is opened to join it. 


This can be declared as a boolean and used as such.
Also declaring variables like this is more clear (it's my own opinion)

PHP код:

new
    FirstVariable,
    SecondVariable,
    LastVariable;