[Unclenick]

Yep. If it sat cocked all those years, the spring may have taken a set, but otherwise I'd expect it to at least fire. Strip it down again and apply something that will attack old carbon and grease, both. Gunzilla left sitting in it for a month will probably take out both. For faster work, some Slip2000 Carbon Killer followed by soaking in mineral spirits for several days should do it.

Once you are really sure it is clean, push the firing pin in and measure how far it sticks out. For most rifles 0.055"-0.065" are good numbers with modern primers, butb I say that with the caveat that I,ve never worked on a 99.