Those are consumables. If you only look at durable goods, and you multiply the number manufactured by the useful lifetime, then I nominate the AK-47.
You are forgetting the oft used quote about the pen being mightier than the sword. This is not really talking about the pen itself - although if this statistic is accurate a Bic Crystal ball point pen would only need to have a useful lifetime of 22 days to beat the AK47 if we assume an average lifetime of 60 years and even without taking into account subsequent sales since 2005.
However the quote it really referring to what the pen writes: books. If we take the best selling example, the Bible, then not only has this book alone sold ~5 billion copies (+/-1 billion depending on whom you believe) the oldest of which is almost 1,700 years old. Other religious texts such as the Qu'ran similarly have wide circulations and are older. So even with your criterion for age times circulation these will have the AK47 completely beaten.