Replace your fiveseven code with the code in the code field...
with set_user_bpammo its not stting the clip magazine only the backpack
and for the awp just change the weapon_fiveseven and write weapon_awp
here you can change ammo count:
cs_set_weapon_ammo(weapon_id, 2 <--- Ammo Count);
Code:
if(random_num(0, 100) <= 10)
{
give_item(player,"weapon_fiveseven");
new weapon_id = find_ent_by_owner(-1, "weapon_fiveseven", player);
cs_set_weapon_ammo(weapon_id, 2);
client_print(player, print_chat, "You were lucky, you got a five seven with 2 bullets (10% chance)")
}