My only carbine, bought at a estate sale, the family had it for years well before WW2 , said to have been bought in Kilbourn City, WI. Serial number for those who have data sheets 11629, I think it is a 3rd model, what do I need to check in order to fire it, I see reproduction cartridges that I can load up easily. I am not sure how this seals in the gases or if I should fire it, I really want to. The carbine is matching. Thank You GR