As new (surplus) 1000 meter adjustable rear sightfor your saiga 12c/k it will work fine on the 7.62 or 5.45 rear sight 1000 meter block also. It took me a while to find the correct sight to build the rifle pic below. I had to buy a few to get one, so I'm selling the rest. A certain russian (although a great guy) on GB sells them for $120 shipping.These are sealed at the spring and very strong, with numbers on both sides and parkerized (factory). $75 shipped add $2 for paypal on the down low. If you need better pics let me know and I'll try. cross posted