I purchased a Sharps carbine that has the 1852 and 1859 dates on the receiver. I was told it was a center fire model 1859. When I got home I started to take it apart to clean and lubricate. I noticed that the firing pin was broken. I have not been able to find a parts breakdown on this model. It looks like the firing is part of the block that is hit by the hammer. I was wondering if anyone could suggest a repair or replacement for the firing pin. The only other problem I found was that the top screw on the receiver, above the saddlering assembly, is a newer flat head. It would be nice to get a screw that is rounded, like the real ones. This is a new rifle to me. I have mostly WWI and WWII rifles and pistols. I am 73 and just got started in this type of collecting.