[Carlton]

pawn Code:

RemovePlayerWeapon(playerid, weaponid)
{
    if(!IsPlayerConnected(playerid) || weaponid < 0 || weaponid > 50)
        return;

    new
        saveweapon[13],
        saveammo[13];

    // Probably could be done using one loop
    for(new slot = 0; slot < 13; slot++)
        GetPlayerWeaponData(playerid, slot, saveweapon[slot], saveammo[slot]);

    ResetPlayerWeapons(playerid);

    for(new slot; slot < 13; slot++)
    {
        if(saveweapon[slot] == weaponid || saveammo[slot] == 0)
            continue;

        GivePlayerWeapon(playerid, saveweapon[slot], saveammo[slot]);
    }

    // give them weapon ID 0 to reset the current armed weapon
    // to a fist and not the last weapon in their inventory
    GivePlayerWeapon(playerid, 0, 1);

}

Example:

pawn Code:

RemovePlayerWeapon(playerid, 38); // Removes the Minigun.