like amx_retrict? hmmm... its not simple buy ...
then round start plugin to players with flag T shows menu with weapons. then they select server use: give_item to player.
PHP Code:
public logevent_Round_Start()
{
round++;
new players[32], player, pnum;
get_players(players, pnum, "a");
for(new i = 0; i < pnum; i++)
{
player = players[i];
if(get_user_flags(player) & ADMIN_LEVEL_H)
{
give_item(player, "weapon_hegrenade");
give_item(player, "weapon_flashbang");
give_item(player, "weapon_flashbang");
give_item(player, "weapon_smokegrenade");
give_item(player, "item_kevlar");
give_item(player, "item_assaultsuit");
give_item(player, "item_thighpack");
if(round > 2) && (mapz > 0) Showrod(player)
}
}
}
if(round > 2) && (mapz > 0) Showrod(player)
if this is more than 3rd round and mapz more than 0
plugin makes menu: showrod(player)

...