I think the issues you're experiencing are caused by the CO2 magazines, I have used mine exclusively with green gas mags and have never seen any parts warp or break. I also installed a stronger recoil spring and a buffer pad that's built into the recoil spring assembly, i tried the ra-tech NPAS nozzle but it couldn't cycle very well in the normal bolt carrier, not entirely sure why. I also needed to put thread glue on the front sight post screw, which I think they should have done from the factory.

I might try the full stroke kit because I really want the realism, i think yours jammed because the recoil rod assembly collapses inconsistently, and im pretty sure a stronger spring would actually fix that issue. I may also look into applying cerakote to that part you mentioned was weak, though i believe the screw is thread glued, so it might cause more damage than good to touch.

Could you make a video on disassembling the hammer and trigger group? I plan to install an upgraded hammer spring (to fix light-striking for overly gassed magazines) and I'm a little apprehensive to try to disassemble it without a guide video. Thanks!

待ってました！ありがとうございます！
私もリコイルを楽しみたくて短い方を使っているのですがリコイルスプリングが曲がらないうちにやめときます💦

内部もスチールなんです？

You should not pull the trigger before dissassembly, since the hammer with get in the way of bolt carrier.

映画「ＡK47」で分解シーン見ましたが、カラシニコフ役の俳優さんがあっという間にさばいててカッコよかったです