From what you have been talking about in bringing the economy up, I believe Option 2 would best fit your ideals for the economy, it would allow for more Roleplay in the sense of trading illegal firearms to buyers and would bring more economy in as people trade money from runs for goods.... This would then also would create not such a high influx of weapons right away, if you were to go with Option 1 straight away.
Personally Option 2 would be a good start, bring in buyable Class 2 firearms and allow roleplay and trading between members of the community for Class 3's. Then later on if you choose to, bring in Option 1... Just my personal opinion as I like Roleplay and Economies...