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CMP Compliant 1911 Mods

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chiz1180
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Post by 1911Garrison Sat Jul 08, 2023 5:34 pm

I've looked around and there seems to be a wide range of opinions about the best upgrades to an 1911. Non, so far, have been specific to CMP matches.

I just bought a Springfield Arms 1911 Garrison. It's stainless with a medium-length aluminum trigger, stock plastic grips, and stock iron sights. I ordered some low profile rubber grips and a short, "match-grade", trigger with a smooth shoe and no front hole for the adjustment screw. I've found the serrations on the shoe and the hole chafe my finger during long rounds. I have very small hands and hoping the low pro's and short trigger will help with my grip.

I am planning on replacing the stock sights with an adjustable rear and fiber optic front. I've heard it's best to have the internal parts "tuned up" for better performance/action. Not sure what this entails. I have noticed the stock trigger has a little play left and right and drags against the frame.

I want to use this for CMP comps and NRA as well until I can afford a dedicated pistol for each. Any suggestions would be appreciated.

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Post by Jon Eulette Sat Jul 08, 2023 5:49 pm

SA RO was the prevalent model before this one. When I build them, I typically replace all the MIM ignition parts with quality steel components. Then rebarrel with NM barrel, new bushing and proper length barrel link. 
Pistol is then capable of winning any match in the country.
Jon
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Post by SingleActionAndrew Sat Jul 08, 2023 5:55 pm

See section 4.1 of the 2023 CMP rules on Excellence in Competition (EIC) guns (e.g. your Service Pistol) and 4.2 for general bullseye

https://thecmp.org/wp-content/uploads/2023/02/2023PistolRules.pdf?vers=030923

Do your new grips meet the requirements of 4.1.1e?
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Post by 1911Garrison Sat Jul 08, 2023 6:04 pm

Jon Eulette wrote:SA RO was the prevalent model before this one. When I build them, I typically replace all the MIM ignition parts with quality steel components. Then rebarrel with NM barrel, new bushing and proper length barrel link. 
Pistol is then capable of winning any match in the country.
Jon
I will do this. Thank you.

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Post by 1911Garrison Sat Jul 08, 2023 6:05 pm

SingleActionAndrew wrote:See section 4.1 of the 2023 CMP rules on Excellence in Competition (EIC) guns (e.g. your Service Pistol) and 4.2 for general bullseye

https://thecmp.org/wp-content/uploads/2023/02/2023PistolRules.pdf?vers=030923

Do your new grips meet the requirements of 4.1.1e?
I've looked over the rules and everything seems to be fine. The new grips are exactly like stock, no finger supports, except made of rubber for better grip and thinner.

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Post by james r chapman Sat Jul 08, 2023 9:09 pm

No wrap around grips if I recall
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Post by 1911Garrison Sun Jul 09, 2023 2:52 am

james r chapman wrote:No wrap around grips if I recall
I believe so. And finger supports as well.

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Post by tovaert Sun Jul 09, 2023 11:01 am

You might want to re-consider the addition of a fiber optic front sight. Also, depending on the style of adjustable rear sight you buy, you may have to change the height of the front sight. Perhaps others here have experience with going from fixed to adjustable sights.

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Post by shanneba Sun Jul 09, 2023 4:45 pm

1911Garrison wrote:
james r chapman wrote:No wrap around grips if I recall
I believe so. And finger supports as well.

So I would take that to mean the Pachmayr Signature grips for the 1911 would not be allowed for the Service Pistol EIC match at the NRA National Matches.
I still have my original Colt wood grips I can use thankfully.

This specific style-

CMP Compliant 1911 Mods 02921_main

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Post by james r chapman Sun Jul 09, 2023 5:45 pm

correct as told to me by a CMP/NRA official.
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Post by chiz1180 Sun Jul 09, 2023 6:33 pm

https://thecmp.org/wp-content/uploads/2023/02/2023PistolRules.pdf?vers=030923

See page 35
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Post by shanneba Sun Jul 09, 2023 6:45 pm

chiz1180 wrote:https://thecmp.org/wp-content/uploads/2023/02/2023PistolRules.pdf?vers=030923

See page 35
No mention of "wrap around" in section 14.1.1 f, must be part of the "etc."

Not mentioned in the 2023 Pistol change document either, "grips must be suitable for right- or left-hand use and have no orthopedic features."
Microsoft Word - Changes in 2023 CMP Pistol Competition Rules.docx (thecmp.org)

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Post by chiz1180 Sun Jul 09, 2023 6:49 pm

f) Grips must adhere to the general design parameters of the original pistol as manufactured. Grips may not provide any additional orthopedic 36 support (i.e., thumb rest, palm rest, palm swell, etc.). Grips must be functionally identical for either right- or left-hand use. 

Original grips in the 1911 were not wrap around. RTFM.
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Post by james r chapman Sun Jul 09, 2023 7:31 pm

Ok. As I recall it wasn’t the wrap that was illegal it was the thumb raised bumps .

f) Grips. Grips must adhere to the general design parameters of the original pistol as manufactured. Grips may not provide any additional orthopedic
                 35

support (i.e., thumb rest, palm rest, palm swell, etc.). Grips must be functionally identical for either right- or left-hand use.
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Post by shanneba Sun Jul 09, 2023 8:28 pm

The grips I have do not have a raised thumb area. Manufacturer #: 02921 Combat Style
Pachmayr Signature Grips 1911 Government Commander Combat-Style Rubber (midwayusa.com) 

I know there are Pachmayer signature grips that do include a thumb swell.

The Pachmayer grips with the thumb swell are product number 02919
Pachmayr Signature Grips 1911 Government Commander Combat-Style Rubber (midwayusa.com)
Choose Thumb swell  under style

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Post by james r chapman Mon Jul 10, 2023 6:23 am

Well, ya pays your $ and takes ya chances.
They will let you know.
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Post by Jacobrm50 Sun Jul 23, 2023 2:20 pm

Jon Eulette wrote:SA RO was the prevalent model before this one. When I build them, I typically replace all the MIM ignition parts with quality steel components. Then rebarrel with NM barrel, new bushing and proper length barrel link. 
Pistol is then capable of winning any match in the country.
Jon

Can you go into more detail and specifics with this for those of us just starting out?
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Post by mbmshooter Wed Aug 02, 2023 7:28 pm

shanneba wrote:
1911Garrison wrote:
james r chapman wrote:No wrap around grips if I recall
I believe so. And finger supports as well.

So I would take that to mean the Pachmayr Signature grips for the 1911 would not be allowed for the Service Pistol EIC match at the NRA National Matches.
I still have my original Colt wood grips I can use thankfully.

This specific style-

CMP Pistol Competition Rule 4.1.1(g) prohibits the use of Pachmayr-style wrap-around grips.  The NRA National Matches and every other competition venue would be required to follow CMP Rules when conducting EIC matches.

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Post by chiz1180 Wed Aug 02, 2023 8:30 pm

mbmshooter wrote:
shanneba wrote:
1911Garrison wrote:
james r chapman wrote:No wrap around grips if I recall
I believe so. And finger supports as well.

So I would take that to mean the Pachmayr Signature grips for the 1911 would not be allowed for the Service Pistol EIC match at the NRA National Matches.
I still have my original Colt wood grips I can use thankfully.

This specific style-

CMP Pistol Competition Rule 4.1.1(g) prohibits the use of Pachmayr-style wrap-around grips.  The NRA National Matches and every other competition venue would be required to follow CMP Rules when conducting EIC matches.
In the current (2023) rule book it is rule 4.1.1 (f)

see page 35
https://thecmp.org/wp-content/uploads/2023/02/2023PistolRules.pdf?vers=030923
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Post by mbmshooter Wed Aug 02, 2023 9:08 pm

chiz1180 wrote:
mbmshooter wrote:
shanneba wrote:
1911Garrison wrote:
james r chapman wrote:No wrap around grips if I recall
I believe so. And finger supports as well.

So I would take that to mean the Pachmayr Signature grips for the 1911 would not be allowed for the Service Pistol EIC match at the NRA National Matches.
I still have my original Colt wood grips I can use thankfully.

This specific style-

CMP Pistol Competition Rule 4.1.1(g) prohibits the use of Pachmayr-style wrap-around grips.  The NRA National Matches and every other competition venue would be required to follow CMP Rules when conducting EIC matches.
In the current (2023) rule book it is rule 4.1.1 (f)

see page 35
https://thecmp.org/wp-content/uploads/2023/02/2023PistolRules.pdf?vers=030923

Sorry, I was looking at the CMP Rule book I was handed when checking in on 14Jul23 for the P100 match.

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Post by NukeMMC Wed Aug 02, 2023 9:10 pm

Jacobrm50 wrote:
Jon Eulette wrote:SA RO was the prevalent model before this one. When I build them, I typically replace all the MIM ignition parts with quality steel components. Then rebarrel with NM barrel, new bushing and proper length barrel link. 
Pistol is then capable of winning any match in the country.
Jon

Can you go into more detail and specifics with this for those of us just starting out?
I can go into what this meant when I sent him a couple Range Officer pistols.  One was a 45, the other a 9mm I wanted converted to 38 Super:
 - I had bought the ignition parts (hammer, sear, disconnector) from EGW.  I bought an EGW checkered mainspring housing, .200" slide stop, firing pin and spring, firing pin stop, full-length guide rod (2-piece).  
 - I sent both to Jon at different times.  He fit the 45 with a Bar-Sto barrel I supplied.  He fit the 9mm with a KKM 38 Super barrel he supplied.  He fit bushings to both.  
 - The 9mm had slight slide-to-frame looseness he tightened up.  
 - He did a trigger job on both that, even though they were a few months apart, the triggers felt almost identical.

Both pistols shoot lights-out.  I am not the best shooter by any stretch of the imagination, but I have been doing it long enough in both rifle and pistol to know that confidence in my equipment, even if I cannot use it to its peak, is worth every penny spent.
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