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  #1  
Old 11-13-2011, 04:36 PM
guns and steel guns and steel is offline
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MIM parts on Sig 1911

What parts on the Sig 1911 stainless are MIM parts? I want to change all those MIM parts to 100% barstock but I cant get a straight answer from those ive talked to from gun smiths to gun store employees.

[IMG][/IMG]
  #2  
Old 11-13-2011, 04:49 PM
crashoverrideplik crashoverrideplik is offline
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Do a search for custom2. He's answered this question many times.
  #3  
Old 11-13-2011, 09:38 PM
Full Frame Full Frame is offline
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Engage that safety. Nice piece, I have the identical gun, and it's got the same updated grips. It's a tack driver. Model #1911R-45-SSS

Here's one of the MIM threads. I'm replacing the MIM parts too, mostly with Wilson Combat stuff.
https://forums.1911forum.com/showthread.php?t=336657


..

Last edited by Full Frame; 11-13-2011 at 09:45 PM.
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  #4  
Old 11-13-2011, 11:31 PM
radareclipse radareclipse is offline
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I bought this gun earlier this year and hated the mismatched colored parts that are nickel plated. Check with George at EGWguns.com in the Philly area to see what parts he can help you with. You may want to change the slide release, plunger tube, extractor. Another source is Greider Precision in CA.

Here's a teaser:


"Custom2" that is on here works for Sig.
  #5  
Old 11-15-2011, 06:44 AM
griz11 griz11 is offline
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the extractor isn't a mim part.
  #6  
Old 11-16-2011, 06:59 PM
David Panciotti David Panciotti is offline
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Quote:
Originally Posted by griz11 View Post
the extractor isn't a mim part.
Nor is the plunger tube. And the plunger tubes are properly staked with a recess in the frame slots for the metal to expand properly.
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  #7  
Old 11-19-2011, 11:53 PM
Branned Branned is offline
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This article by bruce gray (September 24, 2010) says they have NO MIM parts.

http://www.handgunsmag.com/2010/09/2...ranite_061404/
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  #8  
Old 11-20-2011, 12:07 AM
redraider113ci redraider113ci is offline
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Quote:
Originally Posted by Branned View Post
This article by bruce gray (September 24, 2010) says they have NO MIM parts.

http://www.handgunsmag.com/2010/09/2...ranite_061404/
I don't trust anyone who tells their customers "I hate to tell my customers that I have to discard most of the parts in their new 1911 clone to build a truly durable, high-grade custom pistol that can be guaranteed not to go down.". I don't care what parts or how much money you put into ANY firearm, none of them can be GUARANTEED not to go down because eventually, one way or another it will. It's only a machine.
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  #9  
Old 11-20-2011, 08:05 AM
DeltaKilo DeltaKilo is offline
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My Sig Scorpion, when i pulled it apart, snapped off the thumb safety. It was MIM.

The SLide stop? MIM.

The SEAR was MIM.

Everything else looked OK. I'm in the process of replacing the parts with barstock alternatives. Only thing I'm waiting for right now is a replacement thumb safety.
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  #10  
Old 11-20-2011, 09:13 AM
HOKIE_FAN HOKIE_FAN is offline
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Thanks for the info Delta. It puzzles me why they would have 1 of the 3 critical FCS parts MIM and not the others (Hammer, disco). I personally have no issue with a MIM thumb safety, and the slide stop is an easy fix (Greider Precision). My buddy has a Scorpion and it is a great shooter. I'd like to have one myself.
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  #11  
Old 11-20-2011, 09:23 AM
DeltaKilo DeltaKilo is offline
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Quote:
Originally Posted by HOKIE_FAN View Post
Thanks for the info Delta. It puzzles me why they would have 1 of the 3 critical FCS parts MIM and not the others (Hammer, disco). I personally have no issue with a MIM thumb safety, and the slide stop is an easy fix (Greider Precision). My buddy has a Scorpion and it is a great shooter. I'd like to have one myself.
The hammer didn't appear to be MIM, but the Disco, based on what I saw, most likely was. Then again, since the Disco isn't a high-stress part, much less one that needs much resistance to wear and such, I'm less concerned about it.

As to the overall impression of the scorpion...I was impressed by the basic build quality, but i had some pretty big issues with it. The biggest one was the huge amount of takeup in the trigger. Beyond that, the grips *had* to go, along with the G10 mainspring housing.

I also upped the recoil spring to 20#.

Other than that, the gun ran well. It was a little disappointing accuracy-wise, but that's easily remedied with a match barrel and bushing.
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  #12  
Old 11-20-2011, 09:40 AM
Glenn-SC Glenn-SC is offline
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Quote:
Originally Posted by DeltaKilo View Post
My Sig Scorpion, when i pulled it apart, snapped off the thumb safety. It was MIM.
How could you tell that the thumb safety was made using the MIM process?
  #13  
Old 11-20-2011, 10:53 AM
DeltaKilo DeltaKilo is offline
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Quote:
Originally Posted by Glenn-SC View Post
How could you tell that the thumb safety was made using the MIM process?
By looking at the surface of the pieces that broke off.

When barstock steel sheers, it's a smooth, striated surface, although uneven along the weak point/break.

When MIM parts break, the surface is rough and looks like sandpaper, a crystalline surface.

in the case of the thumb safety, where it snapped off, the surface was a crystalline surface, with a grit to it. It was not a barstock part.

Another point that lends to this is that steel has a certain sheering force, and if it's a machined part, will tend to bend/deform before it snaps apart. The thumb safety snapped with very little force applied, and there was no deformation at all, it was simply a weak spot that appears not to have been properly heat-treated to completely bond the powder.
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  #14  
Old 11-20-2011, 11:05 AM
HOKIE_FAN HOKIE_FAN is offline
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Looking at both the P229 .40 and the 1911 Scorpion in the new American Handgunner, The first thing I noticed was the grouping pictured on the test targets from the 1911. The grouping were much tighter with the 229. Replacing the barrel is definately an option..but a shame that it's necessary. Regardless, it's a fine looking pistol.
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  #15  
Old 11-20-2011, 11:25 AM
DeltaKilo DeltaKilo is offline
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Quote:
Originally Posted by HOKIE_FAN View Post
Looking at both the P229 .40 and the 1911 Scorpion in the new American Handgunner, The first thing I noticed was the grouping pictured on the test targets from the 1911. The grouping were much tighter with the 229. Replacing the barrel is definately an option..but a shame that it's necessary. Regardless, it's a fine looking pistol.
At 10 yards, from a rest, I can get it to hit about 2". Compared to another pistol with a properly fitted barrel and tight lockup, I get 1" or less at the same range. i expect with a replacement, fitted barrel and bushing, this pistol will be in the same accuracy range.
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  #16  
Old 11-20-2011, 11:42 AM
HOKIE_FAN HOKIE_FAN is offline
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I would agree. I look forward to updates as the mods progress.
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  #17  
Old 11-23-2011, 12:05 PM
deatheater2 deatheater2 is offline
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My brother's neighbor's cousin's best friend told me if you don't replace the MIM parts your pistol will explode after the first round.
  #18  
Old 11-23-2011, 12:20 PM
DeltaKilo DeltaKilo is offline
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Originally Posted by deatheater2 View Post
My brother's neighbor's cousin's best friend told me if you don't replace the MIM parts your pistol will explode after the first round.
Well, I don't have anything against *good quality* mim parts. However, the safety snapping off with very little pressure applied when disassembling the gun generally suggests that the part itself is not a quality part.
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  #19  
Old 11-23-2011, 01:54 PM
dj528 dj528 is offline
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The sear in my gun is not MIM, it is the EGW hard sear. I don't know if Sig has stopped using the EGW sear, it would be a big disappointment if they did. Of the MIM parts the ambi-safety appears to have the most problems. Delta's experience is not the first posted on this forum.
  #20  
Old 11-23-2011, 02:13 PM
DeltaKilo DeltaKilo is offline
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Quote:
Originally Posted by dj528 View Post
The sear in my gun is not MIM, it is the EGW hard sear. I don't know if Sig has stopped using the EGW sear, it would be a big disappointment if they did. Of the MIM parts the ambi-safety appears to have the most problems. Delta's experience is not the first posted on this forum.
i went back and double-checked, my Sear is in fact an EGW, not a MIM part. Regardless, I've now replaced sear and hammer with a Blue Force Gear parts set (I had those parts on hand), for a no-takeup-clean-break trigger.
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  #21  
Old 11-23-2011, 04:29 PM
HOKIE_FAN HOKIE_FAN is offline
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Hey those grips dont look like barstock! I can't believe they are using wood... Those things will fall right apart in about 200 years...

Delta- glad to hear about the sear. EGW makes great parts.
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  #22  
Old 11-23-2011, 05:13 PM
DeltaKilo DeltaKilo is offline
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Originally Posted by HOKIE_FAN View Post
Hey those grips dont look like barstock! I can't believe they are using wood... Those things will fall right apart in about 200 years...

Delta- glad to hear about the sear. EGW makes great parts.
They do make a good part. However, I find that I like the outcome of the blue force parts over the EGW.
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  #23  
Old 11-24-2011, 09:12 AM
David Panciotti David Panciotti is offline
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Quote:
Originally Posted by DeltaKilo View Post
My Sig Scorpion, when i pulled it apart, snapped off the thumb safety. It was MIM.

The SLide stop? MIM.

The SEAR was MIM.

Everything else looked OK. I'm in the process of replacing the parts with barstock alternatives. Only thing I'm waiting for right now is a replacement thumb safety.
The sear is not MIM. It is a machined part and so is the hammer. The disco is MIM though. It is very easy to get an amazing trigger job using the existing parts. I'm sure Vicker's parts are top notch as well but you could have saved some dough by just stoning your existing parts. I will take that sear off your hands if you don't want it anymore. Sig has the best fire control parts out of all the mass produced 1911's.
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Last edited by David Panciotti; 11-24-2011 at 09:23 AM.
  #24  
Old 11-24-2011, 09:15 AM
David Panciotti David Panciotti is offline
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Originally Posted by Glenn-SC View Post
How could you tell that the thumb safety was made using the MIM process?
MIM parts will usually have little circles on them or they will have what look like seams.
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  #25  
Old 11-24-2011, 09:36 AM
DeltaKilo DeltaKilo is offline
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Originally Posted by custom2 View Post
The sear is not MIM. It is a machined part and so is the hammer. The disco is MIM though. It is very easy to get an amazing trigger job using the existing parts. I'm sure Vicker's parts are top notch as well but you could have saved some dough by just stoning your existing parts. I will take that sear off your hands if you don't want it anymore. Sig has the best fire control parts out of all the mass produced 1911's.
Yes, the Sear is not a MIM part, and is in fact an EGW part, so that's good to go. I opted to replace the trigger group parts as a means to get what I wanted more easily than doing a long amount of work on the stock parts, so, you could go either way. I think the first step that would be advisable is replacing the disconnector with a barstock part and a thicker pad, this will reduce the takeup, and then with some stone work you'll get a great pull out of the stock parts.

As to the best fire control parts out of all the mass produced 1911s, yes, i agree with that.
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Last edited by DeltaKilo; 11-28-2011 at 07:40 AM. Reason: un-ruding my post.
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