I had this problem also, with the carrier hanging up in the rear. I think the push button for the recoil spring acts as a guide to keep the carrier aligned with the rails. If the rear trunnion holes are drilled slightly too high, then the carrier can become misaligned and pop out.
http://armsofamerica.com/polishfbradombrandnew762x39coldhammerforgedbarrelbuyanyv-projectproductpartskitandorqty3andreceive1000offeachbarrel.aspx
on sale $169
yeah, this.
I don't use aftermarket triggers in any of my guns (except the AKT and G2), but now I have seen the light...
I also pre-ordered the akt-e back in march or april... hopefully they push it out soon
I am, it's super short/light. My action got rougher though, compared to my polished G2. I also had to install the safety pin. This is on a polish kit/armory USA receiver