These rivet sets were custom made by AK-Builder for AoA to go with their Polish AKML and AKMSL parts kits. They graciously let me buy some leftovers.
This is a standard AKM rivet set, but with two custom rivets:
1) The center support rivet is extended, to tie through the AKML / AKMSL / RPK-N / AK-63 side rail
2) One of the 4.5mm long rivets is also extended for the same reason
Please note: the pre-formed heads of these rivets are markedly different than past offerings from AK-Builder and will very likely require modification to your tooling to be supported properly.
