I think you mean the "segment, locking, erector" is stuck, It is made of pot metal and has a hole in the top. You should be able to get a small drift punch or jewelers screw driver in the hole to carefully break it loose and lift it out. The serrations on the bottom side engage the grooves on the erector keeping it from shifting under recoil. It may be corroded in place and if that's the case, it may take some more heat to get it out.

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Definitely get a copy of the booklet from DS Solutions.