It's one of the bolt-action tube fed models, not sure of the exact type. I got together over the weekend with the rifle's owner and he was having problems with light firing pin strikes. It could be the spring but I suspect it's just lack of maintenance and lubrication (I don't think the poor thing was ever blessed with a proper takedown and cleaning), either way I'm going to need to show him how to take the thing appart so we can have a better look at the problem. I couldn't figure out how to remove the bolt.