Replies

• Linefinder Posts: 7,856 Senior Member

  May 2019 edited May 2019 #2

  Well, that's a supply chain malfunction, which you can't really blame on yourself. But, here's one I hope you don't encounter....
  
  Spend 3 days making a tiny 420 SST part with multiple features, heat-treat it, surface grind it to spec, then discover you missed milling a tiny radius in the bottom of a blind hole that's critical to the part working as advertised, according to a young engineer whose qualifications consist of his diploma and his pride.
  
  Yes, I could have fixed it in 2-3 hours with a polishing stone. But that wasn't good enough.
  
  Start over, while other jobs backlogged.
  
  Been there, done that. And that hurts.
  
  I'd love to do this for funsies once in a while. Doing it for a living to FDA specs takes a lot of the fun out of it.
  
  I have more common sense than patience, occasionally.
  
  Mike
  
  
  
  
  

  "Walking away seems to be a lost art form."
  N454casull
  

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• timc Posts: 6,684 Senior Member

  May 2019 #3

  Linefinder said:

  Well, that's a supply chain malfunction, which you can't really blame on yourself. But, here's one I hope you don't encounter....
  
  Spend 3 days making a tiny 420 SST part with multiple features, heat-treat it, surface grind it to spec, then discover you missed milling a tiny radius in the bottom of a blind hole that's critical to the part working as advertised, according to a young engineer whose qualifications consist of his diploma and his pride.
  
  Yes, I could have fixed it in 2-3 hours with a polishing stone. But that wasn't good enough.
  
  Start over, while other jobs backlogged.
  
  Been there, done that. And that hurts.
  
  I'd love to do this for funsies once in a while. Doing it for a living to FDA specs takes a lot of the fun out of it.
  
  I have more common sense than patience, occasionally.
  
  Mike
  
  
  
  
  

  The real test will be with the other slide I have coming. This is the one I plan on cutting some openings and serration. My fist true test....

  timc - formerly known as timc on the last G&A forum and timc on the G&A forum before that and the G&A forum before that.....
  AKA: Former Founding Member

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• tennmike Posts: 27,457 Senior Member

  May 2019 #4

  Have fun with the cutting of openings and serration. Plan your work, work your plan, and go slow and deliberately..................and it will turn out good!
  

    “I refuse to answer that question on the grounds that I don't know the answer”
  ― Douglas Adams
  

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• timc Posts: 6,684 Senior Member

  May 2019 #5

  tennmike said:

  Have fun with the cutting of openings and serration. Plan your work, work your plan, and go slow and deliberately..................and it will turn out good!
  

  Thanks, I’m feeling more comfortable with the mill now, cutting the lower built up confidence even though it was only polymer but it came out nice and clean. 
  Ive been practicing learning speeds and what I can get away with on my machine. 

  timc - formerly known as timc on the last G&A forum and timc on the G&A forum before that and the G&A forum before that.....
  AKA: Former Founding Member

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• CHIRO1989 Posts: 14,857 Senior Member

  May 2019 edited May 2019 #6

  How long did the milling the part take? Do you have to put on some sort of serial # on your part? I am assuming this started as an 80% lower.

  I take no pleasure in the death of the wicked, but rather that they turn away from their ways and live. Eze 33:11

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• timc Posts: 6,684 Senior Member

  May 2019 #7

  CHIRO1989 said:

  How long did the milling the part take? Do you have to put on some sort of serial # on your part? I am assuming this started as an 80% lower.

  The milling took me about 20-30 minutes, longer moving the jig around and setting up than cutting. I also went very slow since this was my first time at it. It was all really easy, I was just being super careful. 
  No S/N required in my state but I cannot sell it or give it away, of course I don’t know how anyone would know. I just wanted to build one to get me started. I didn’t really save any money over buying a new gun but I did upgrade several parts over factory. The downside is I now have a gun I can never get rid of, I don’t think I would want too many like that.
  not quite finished yet. This is what it looks like with slide 1. I’ll post more pics when completed.
  
  
  

  timc - formerly known as timc on the last G&A forum and timc on the G&A forum before that and the G&A forum before that.....
  AKA: Former Founding Member

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• Diver43 Posts: 12,775 Senior Member

  May 2019 #8

  Those missing parts are kind of impotant.
  
  Looking good so far

  Logistics cannot win a war, but its absence or inadequacy can cause defeat. FM100-5

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• timc Posts: 6,684 Senior Member

  May 2019 edited May 2019 #9

  Diver43 said:

  Those missing parts are kind of impotant.
  
  Looking good so far

  They are, just a little...Everything else is working smoothly, I just need to finish it up and make sure it makes noise.
  

  timc - formerly known as timc on the last G&A forum and timc on the G&A forum before that and the G&A forum before that.....
  AKA: Former Founding Member

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• timc Posts: 6,684 Senior Member

  May 2019 #10

  Get her done today, last part came in and she is complete. Fired an empty case with a primer only to make sure she will go bang, cycles rounds out of the mag with no issues, extractor works fine. I think it’s time for a range trip...
  The only Glock OEM parts on this build are the mags.
  

  timc - formerly known as timc on the last G&A forum and timc on the G&A forum before that and the G&A forum before that.....
  AKA: Former Founding Member

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