Airsoft Canada - Bolt Not Locking With Zero Trigger

Hi!

internals:
Zero Trigger
Ball Bearing Spring guide
laylax hard hop
150 spring

B4 I start, I just want to say : When I first got my zt, I didnt know how to put it on the gun. I completely dismantled it. I was able to put it back together(hopefully correctly). I used it for a while.

My gun had been having a rough bolt pull. I tried everything, but still rough. So my last thought was to dismantle the ZT and put it back together and see if that changes anything. IT DID. NOT FOR THE BETTER. Now when I pull the bolt back, it WONT LOCK!!

I looked at the piston sear and I was just a slight difference in the middle of it. The middle was JUST a little wore/lower and alittle more shinier than the sides on the top. I had the zt for just about 1-2months. I don't think that is the problem, because how it the world will it get like that in 2 months?!

Also, the spring guide stopper was originally black, but now the parts that are being touched are silver. Is that normal too?

The way I put my gun together, is to put the cylinder first then put the zt because I tie a string on the spring guide stopper so it doesnt get loose. Could that b a problem too?

So if you guys got lost cuz of my talking, the main point is that the bolt is not locking when i pull it back and i need it to lock lol

I have a game tommorrow! please need to find answers asap