SPRINGFIELD  .45-70 TRAPDOOR CARBINE BARREL AND BREECH BLOCK, PLUS PARTS. Serial number 105355. Serial number is ca. 1881. This is a rifle barrel professionally turned down to a carbine barrel. I bought this from S & S Firearms many years ago and never finished it. Good shooting bore. Should make a nice usable carbine. Photos are part of the description so look them over carefully. 100% satisfaction or your money back.