That GBB Guy got this video to show you how to fix the PPS/Tanaka Kar98 light issue... "Over time, the striker on your PPS or Tanaka Kar98 can unscrew itself. This will cause light strikes and erratic fps. In this video, I will show you how to disassemble the bolt to fix this issue. Hopefully, this will enable you to get this awesome replica back in the game!"