Bulgarian made rivet sets for the AKS-74U triangle folding rear trunnion.
These have proper flat heads to get the authentic look.
Includes one long rivet, and 5x short rivets (only 4 are needed, one is a free "oopsie" rivet).
For maximum authenticity, the long rivet should be installed with the flat head on the left hand side, and a dome formed on the right hand side.