Google "remove AK Rear sight". All you really need is a flathead screwdriver wrapped in a couple layers of masking tape. Use that to push the spring away from the rear sight leaf, then push the leaf down and out of the holes.
Then drop the rail in, run the screw through the side (the rail is actually threaded) and put the nut on the other end. There are 3 set screws to lock the rail in place.
You need a really tiny allen wrench to screw in the set screws, and I really wish Strike Industries had included the proper size.
Pros: really easy install
Cons: needs a tiny allen wrench, not included
This review was written in the old system and had content requirements that are different than reviews written today.