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Author Topic: Colt 1911 Mod 70 sights  (Read 17969 times)

Chainsaw

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Re: Colt 1911 Mod 70 sights
« Reply #30 on: August 08, 2010, 06:29:14 PM »
I had one of those Series 70 CB Colts back in the mid 70's. It was the least accurate M1911 I've ever owned. Good ammo could get you 8" groups at 25 yards, while my Essex frame parts gun got 3" at the same range/ammo. I never was able to make it whoot well, and not having the money back them for an accuracy job I sent it down the road and bought a Colt New Service in .45LC that did shoot very well.

jim
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alfsauve

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Re: 1911 Safety Breaks.
« Reply #31 on: August 11, 2010, 07:17:32 PM »
[I'll just keep this thread going for my 1911]

BAD NEWS:

I went to the "new" range today which has true 25 yds indoor bays.   Took a bean bag or two with me and pulled up a stool and hunkered down to see what groups I could shoot.   Was working on a 3" group when the slide locks back after only 3 rounds out of the mag.   I look at my hand and the safety fell out.

Now this isn't the original.  It was an Ed Brown wide style extended safety that I installed just a couple of months ago.   (Must find receipt)  Broke where the pivot pin connects to the main body (pictures later).   Dad burn it.  Without the dual plunger and spring the slide hold open kept popping up.    Fortunately, when I swept up my brass the spring and plungers were there.    Got home and reinstalled the original.
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twyacht

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Re: Colt 1911 Mod 70 sights
« Reply #32 on: August 11, 2010, 07:43:21 PM »
Hey alf, does the grip have a "notch" in the grips, to allow the safety to come together?  My Ed Brown ambi-safety on my 1911, when the grips are off for cleaning, can slip through the frame.  ???

Just trying to figure what "broke".... Pics will help, "pivot pin to the main body" broke?

It sounds like a simple fix, but something that should not have happened. Brown products, are good stuff, just curious, as to where it broke and why.





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Thomas Jefferson: The strongest reason for the people to keep and bear arms is, as a last resort, to protect themselves against the tyranny of government. That is why our masters in Washington are so anxious to disarm us. They are not afraid of criminals. They are afraid of a populace which cannot be subdued by tyrants."
Col. Jeff Cooper.

m25operator

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Re: Colt 1911 Mod 70 sights
« Reply #33 on: August 11, 2010, 07:49:23 PM »
If you call Ed Brown, I doubt you will need a receipt, did it break where the tenon joins the stirrup in the middle of the safety?
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alfsauve

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Re: Colt 1911 Mod 70 sights
« Reply #34 on: August 12, 2010, 05:33:27 AM »
Here's the picture.    Haven't had a chance to call yet. 




And here is a picture of it installed before it broke.




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Re: Colt 1911 Mod 70 sights
« Reply #35 on: Today at 05:59:42 AM »
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PegLeg45

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Re: Colt 1911 Mod 70 sights
« Reply #35 on: August 12, 2010, 05:47:46 AM »
As porous as the metal looks in the pic, looks looks like poor casting or forging where a 'pocket' formed at the time of the original alloy mix. Just the luck of the draw that the spot was at a critical stress junction. It happens from time to time in metallurgy.
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For the Patriots of this country, the Constitution is second only to the Bible for most. For those who love this country, but do not share my personal beliefs, it is their Bible. To them nothing comes before the Constitution of these United States of America. For this we are all labeled potential terrorists. ~ Dean Garrison

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alfsauve

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Re: Colt 1911 Mod 70 sights
« Reply #36 on: August 12, 2010, 06:39:39 AM »
Just took a real careful look at the broken piece and I think the safety is actually made of 4 pieces and welded together.    At least the pivot pin and the flat piece appear to be different and I can see the seam between them.   It appears for the pivot they ream a shallow "pit" into the flat part of the safety.  Then the end of the pivot pin is shaped to fit in the pit, where it is welded.
 I COULD BE WRONG.

And upon further inspection the thumb portion as well as the safety lug itself may all be separate pieces. 

I don't have true "macro" lens for my camera,  but I'll try to take another close up of just the pin.

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PegLeg45

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Re: Colt 1911 Mod 70 sights
« Reply #37 on: August 12, 2010, 06:46:19 AM »
If the safety is one of their investment casting parts, it would have some lines that made it resemble being welded. I guess the only way to know for sure is to contact them.

Ed Brown FAQ's:
Quote
Do Ed Brown handguns have any MIM (metal injection molded) parts?

No, we use no MIM parts in Ed Brown firearms. While the current thinking is that MIM parts are "good enough" for firearm applications, this thinking doesn't fit with our philosophy at all. All Ed Brown parts are made from either forgings, bar stock steel, or quality investment castings.

http://www.edbrown.com/cgi-bin/start.cgi/FAQ.htm#aau
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"I expect perdition, I always have. I keep this building at my back, and several guns handy, in case perdition arrives in a form that's susceptible to bullets. I expect it will come in the disease form, though. I'm susceptible to diseases, and you can't shoot a damned disease." ~ Judge Roy Bean, Streets of Laredo

For the Patriots of this country, the Constitution is second only to the Bible for most. For those who love this country, but do not share my personal beliefs, it is their Bible. To them nothing comes before the Constitution of these United States of America. For this we are all labeled potential terrorists. ~ Dean Garrison

"When it comes to the enemy, just because they ain't pullin' a trigger, doesn't mean they ain't totin' ammo for those that are."~PegLeg

alfsauve

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Re: Colt 1911 Mod 70 sights
« Reply #38 on: August 12, 2010, 07:11:04 AM »
Thanks PegLeg.  I had been to their website but hadn't seen that part. 

 One thing they caution about while installing this part is not to "square" this joint too much as it will weaken.  Fortunately, I didn't file any on it at all as it mated with my frame satisfactorily.   I sent them an email this morning with pictures. 



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alfsauve

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Re: Colt 1911 Mod 70 sights
« Reply #39 on: August 12, 2010, 08:52:30 PM »
Ed Brown Products responded quickly this morning with a Return Authorization.   I mailed the broken parts back to them today and will await their decision.

Meanwhile back to the range tomorrow to re-try some groupings with my Colt.

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