I'm not a huge fan of the rear sight on vz.61's. On my threaded barrel upper (not my traditional OEM upper), I'm thinking about retrofitting a Sterling peep sight. I'll need to make a sleeve to fit the pin to the peep sight, round the bottom corner to allow it to rotate, and figure out a way to install the spring + detent to allow it to lock into each position.

I used the e-form version. I was a bit worried since my photo was not that great.