Something

#include <amxmodx>
#include <amxmisc>
#include <fun>
#include <cstrike>

#define Plugin "Weapon Chance"
#define Version "1.0"
#define Author "Doombringer"

#define TIME_TO_WAIT 4

public plugin_init()
{
	register_plugin(Plugin, Version, Author)
	register_logevent("round_start", 2, "1=Round_Start")
}

public main_func()
{
	new players[32], num
	get_players(players, num)
	
	new player
	for(new i = 0; i < num; i++)
	{
		player = players[i]
		
		if(random_num(0, 100) < 97 && random_num(0,100) > 100 )
		{			
			give_item(player, "weapon_awp")
			
			cs_set_user_bpammo(player, CSW_AWP, 3)
			client_print(player, print_chat, "You're lucky...You got a AWP with 3 bullets (1/100 Chance)")
		}
		
		if(random_num(0, 100) < 80 && random_num(0,100) > 95 )
		{
			give_item(player, "weapon_fiveseven")	
			
			cs_set_user_bpammo(player, CSW_FIVESEVEN, 2)
			client_print(player, print_chat, "You're lucky...You got a five seven with 2 bullets (1/20 Chance)")
		}
		
		if(random_num(0, 100) < 30 && random_num(0,100) > 70 ) 
		{
			give_item(player, "weapon_hegrenade")
			client_print(player, print_chat, "You're lucky...You got a hegrenade (1/6 Chance)")
		}
		
		if(random_num(0, 100) < 20 && random_num(0,100) > 40 )
		{
			give_item(player, "weapon_shield")			
			client_print(player, print_chat, "You're lucky...You got a shield (1/15 chance)")
		}
	}
}

public round_start()
{
	set_task(TIME_TO_WAIT, "main_func")
}