Looking for information on a gun maker: B K

[Gun_Nut_73]

I have a .31 cal squirrel rifle that I bought around 1978-1980.  The diagonal flat away from the lock is stamped: "  .31 cal  B K  77 ".  I am almost sure 1977 was the year of manufacture. 

Does anyone know or have an idea of who the maker might be?

Thanks in advance.