This rivet set contains all the rivets necessary to assemble an AK-47 rifle. Different rivet packages are available for different variants of the AK. Notes:Longest rivet for rear trunnion or Yugo/RPK front trunnionNext shorter rivet with a swell in the neck is for the upper front trunnion or pistol grip mount rivet for Yugo M70 fixed stockNext shorter rivet with a swell in the neck is for the front or rear trunnion (countersunk holes use swell neck rivets)Short non-swell neck rivet is for the flat front trunnion holes, front four rivets on the trigger guard, rear rivet on the trigger guard if using a reinforcement plate and pistol grip mounts on YugoShortest rivet is for the rear of the trigger guard on non-Yugo, or for Yugo when not using a reinforcement plateSets for use with underfolders may have extra slightly longer rivets so that the appropriate length may be used with or without a reinforcement plate