http://www.patreon.com/ForgottenWeapons
The Swiss SIG factory was one of the earliest producers of semiautomatic military rifles, having produced the M1908 Mondragon rifles for Mexico. They continued to experiment with self-loading rifle designs, and in the mid 1920s came up with these two examples. They are extravagantly complex, and it is quite clear why they did not become production items - but they are fascinating to examine...
