Sig PE-57 and AMT repair sections

Pete, a friend of Gun Lab, was at the last Knob Creek show and picked up a PE-57 kit and repair section. He was nice enough to send me some pictures of the repair part and I thought I would add a few pictures of my AMT rifle to give you a comparison.

The first thing I have to say is that I am not beating up on the guy that made this repair section. This receiver is very complex and if made with the correct steel would be very difficult to press. With out having a progress stamping set up I think he did a descent job.

I also did not have the repair section here to measure.


DSC_5457sthe ejection port still needs to be cut out and formed









GE DIGITAL CAMERAHis bend looks a little rough.



GE DIGITAL CAMERAEverything seems to match up when pressed together

GE DIGITAL CAMERAThe most glaring issue I see is the caming surface.



DSC_5459sOn the original weapon it is a clean and precise bend.


DSC_5461sThis one looks to have a not so clean surface and a dimple in it.


GE DIGITAL CAMERAWho ever made this put a great deal of work into it. It does need a re-press to clean it up.

I would like to hear from people that have used this repair section to build up a rifle.

13 comments to Sig PE-57 and AMT repair sections

  • GregT

    I’m always trying to find out more info from other builders too. Unfortunately, even though he’s been making these for quite some time, I really haven’t seen much. I’ve got three of the repair sections, and multiple kits. All of them will have to wait until I move, though it’s really tempting to unpack and start working on them.

    One thing I’ve always been interested in, but have never gotten a response from anyone about, is whether they figured out a way to re-braze the receiver onto the trunnions, or if they’ve just welded. If it is welded, how is the weapon holding up? Did they do any heat treating? Any clean up of that camming surface? Etc.

    RIP Weaponsman

  • Chuck

    Hello GregT. Pete is actively working on his and will have a report and pictures in the future.

    • GregT

      That would be terrific, looking forward to it. I know there are a few builds out there, but no one seems to talk about them much. FYI, there’s a DSA MAGarms Stg-57 build for sale currently on GB.

  • arturo klisowski

    Wait, somebody is actually making repair sections for the STG and there are builders!! I have have been looking for a recommended builder for some time, I desire a STG more so than I should. Has anybody been able to source barrels yet? I heard that was one of biggest hurdles, well that and magazines.

    • GregT

      The same guy that was/is making the repair sections also had some barrels made. I’ve got a few of his, both in .308 and in 7.5. They look excellent.

      I’ll see if I can dig out my repair sections for a comparison view, I wonder if anything has changed, or if there are several generations of them out there.

  • Chuck

    Pete found it at the “Creek” I don’t know is they are still making them. He has spent a great deal of time and energy re-stamping it to correct the radius and bends. He is sending pictures for a write up.

  • Randy Moon

    Is this the repair sections made by a guy near Houston or Dallas? I heard he wasn’t making them anymore. If these have become available again I have several kits to build!

  • GregT

    I did dig out my repair sections, and they look exactly like the one you posted, Chuck. I’m also still curious as to how the reprofiling went to correct the radius etc.

  • Interesting that I spoke to Mike (the maker of the repair sections) just today. We had a nice conversation in which it was determined that the piece I had built my rifle with was most likely a less than perfect piece that would not have been sold normally and most of the extra work I had to do would not usually be needed. It was ok in the end and I’m up to over 600 rds. thru the gun, all shooting just fine with one of the .308 barrels.
    Mike says he’ll have another run of the rec. pieces available before too long.
    Pete in St. Louis

    • GregT

      Thanks for that report, Pete.

      Sounds like it’s a runner, it’ll be interesting to find out how it does long term. Did you do a weld on the front trunnion, or what did you do to attach it? I’ve been asking everyone about that, I’ve never gotten an answer. I’ve got two of the receiver repair sections, but seeing how the factory did it (looks like induction brazing?), I’m still trying to figure out the most durable way to fix the receiver on the front trunnion.

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