Of the four basic breach loading cartridge guns, Sharps, Spencer, Remington an Springfield TD type arms, the Springfield can be built up on a Gemmer style conversion that looks like the older Hawken family of arms.
This is due primarily to the fact that the Springfield's use a one piece stock instead of the two piece stocks of the guns with full receivers like the Sharps, Spencer and Remington's.
They are all great looking and well designed. In my opinion, these are the most hansom of American made Sporting Rifles!
My best,
Blair