#include <sourcemod>
#include <sdktools>

#pragma tabsize 0

public OnPluginStart()
{
    HookEvent("ammo_pickup", Event_ItemPickup, EventHookMode_Pre)
}

public Action:Event_ItemPickup(Handle:event, const String:name[], bool:dontBroadcast)
{

    new client = GetClientOfUserId(GetEventInt(event, "userid"))

    if (!client || !IsClientInGame(client)) return Plugin_Continue;

    new weaponIndex = GetPlayerWeaponSlot(client, 0);

    if(weaponIndex == -1)
    return Plugin_Continue;

    new String:classname[64];

    GetEdictClassname(weaponIndex, classname, sizeof(classname));

    if(StrEqual(classname, "weapon_grenade_launcher"))
    {
        new iPrimType = GetEntProp(weaponIndex, Prop_Send, "m_iPrimaryAmmoType");
        SetEntProp(client, Prop_Send, "m_iAmmo", 7, _, iPrimType);
    }
    return Plugin_Continue;
}