All the primary silver miners/explorers that've been on the asx that I know of were rubbish businesses. So if you think that pattern will change ..
You could look at Kingsgate (KCN) I guess, but so risky. Been a terrible stock for holders. It identifies as a gold miner, but is touting that the company's future lies with its Chilean project, Nueva Esperanza, for which they claim a probable reserve of 53.5m ozs of Ag plus gold credits (June 2014). Grade of reserve they claim is 113g/t Ag equivalent. The larger resource (not reserve) was added to in June 2015.
http://www.kingsgate.com.au/nueva-esperanza-overview/
I have absolutely no idea of whether they'll make a go of it, but history of these things suggests not. Would suggest a chart based decision only, and later on if interested.
KCN looks like it could go even lower from the chart, jmo.
Kingsgate (KCN) have big troubles with the sensationalist anti western media in Thailand over Kingsgate's Chatree mine. Problems with extortionate private interests, environmentalists, supine bureaucracy, rentacrowds, and military government wanting to look good domestically; little real rule of law if you believe management - see chairmans last address.
SW2, BHP's spin-off, you most likely know about with its Cannington mine. But there your silver is diluted by all S32's other metals. Anyway silver was never treated as a worthy metal by BHP and they always sold it as a contained by product as I remember. Sold it cheap as a credit for what they could get, and probably S32 same.
I dont consider either of these worthwhile ideas, I just like posting, lol.
My opinion is dont bother with silver stocks unless you're a fickle short term trader.