Just the shape of the base. It is the same on the other side.



---------- Post added at 05:30 PM ---------- Previous post was at 05:27 PM ----------

I also put this sight on the Indian Ishapore 1A1 I had since I didn't like the original sight the Ishapore came with. I recently had the 1A1 deactivated, so I took this sight back off and put the original back on.