>>64034431>Can you swap out the front trunnion without worrying about head spacing?You'd need to set headspace anyway during your build regardless of which front trunnion you use. The original is preferable but not required.
>It came with the original barrel already drilled for the barrel pin.It's gonna need to have to be drilled again when you set headspace. Use an oversized barrel pin (AK Builder has them). This isn't a suggestion, you have to do it this way.
>Maybe I could build material back up where the front of the mag locks in, but would the heat mess with the strength of the trunnion or anything like that?Don't bother with that, you're right it would mess with the heat treatment of the trunnion.
Are you going to build it yourself or send it out?