[grand.Theft.Otto]

Like mmrk did, you can use PVar's. You can also use variables to store the player's last weapons/skin too. Here, try storing the weapons in a variable this time instead of PVars:

pawn Code:

// top of script

new WepBeforeDuty[MAX_PLAYERS];

// place this in your /onduty script BEFORE the player gets the minigun and other weapons

WepBeforeDuty[playerid] = GetPlayerWeapons(playerid);

// when the player types /onduty again (to go off duty)

GivePlayerWeapon(playerid,WepBeforeDuty[playerid]);

The above should give you the weapons they had before (maybe the exact same ammo too but I don't know for sure).

All together, the /onduty command should look like this:

pawn Code:

dcmd_onduty(playerid,params[])
{
    #pragma unused params
    if (AccInfo[playerid][Level] >= 1)
    {
        if(AccInfo[playerid][OnDuty] == 0)
        {
            SetPVarInt(playerid, "Skin", GetPlayerSkin(playerid)); // added
            
            AccInfo[playerid][OnDuty] = 1;
            SetPlayerHealth(playerid,100000);
            SetPlayerSkin(playerid,294);
            WepBeforeDuty[playerid] = GetPlayerWeapons(playerid); // getting their weps BEFORE it sets to minigun
            GivePlayerWeapon(playerid,16,50000);
            GivePlayerWeapon(playerid,38,50000);
            return SendClientMessage(playerid,green,"You are now in Duty Mode");
        }
        else
        {
            SetPlayerSkin(playerid, GetPVarInt(playerid, "Skin")); // Added
            GivePlayerWeapon(playerid,WepBeforeDuty[playerid]); // giving the weapons back that we used above ^
            AccInfo[playerid][OnDuty] = 0;
            SetPlayerHealth(playerid,100);
            return SendClientMessage(playerid,orange,"You are now Off Duty");
            
        }
    }
    return ErrorMessages(playerid, 5);
}