Major Classifications by PERIOD:


I.  Conversions of muzzle-loaders to breechloaders   (~1865-1869)

II.    Purpose-built breechloaders  (~1869-1886)
     A.    Single-shot rifles   
              (Linked List)
     B.    Magazine rifles
           i.  Tube magazine rifles   (1869, 1878-1888)
                   (Linked List)    (Note: add  Swiss Vetterlis)
           ii.  Box magazine rifles   (1886-1890)
                   (Linked List)

Major Classification by TYPE


Conversions
      Forward lifting block (Mont Storm)
              (Linked List)
      Side lifting block (Snider)
             (Linked List)   
Purpose-built
       Lifting block
                (Linked List)
        Pivoting block
              (Linked List)
       Dropping block
              (Linked List)
        Turning block
              (Werndl)
       Turning bolt
              (Linked List)