S/42 K

[Pelorat]

That, good sir, is a fabulously rare example of a .577/.450 chambering. Utilising the same cartridge as the 1871 Martini-Henry rifle, it was used by British intelligence agents as a weapon of assassination, last-resort self-defence, and suicide. Interestingly enough, it was also a functional wind instrument.

Note the early flash hider design and vented forearm grip.

=)