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The Colt 1911 Guide to Modifications according to Jeff Cooper

3832 Views 65 Replies 29 Participants Last post by  theraptur
I offer this without comment, take from it what you will! I do not remember the date of this list but it was a while back!

THE COLT 1911 .45 ACP:
Guide to Modifications, according to Jeff Cooper

High Visibility Sights (including ramped front)
A crisp 3 1/2 to 4 1/2 lb. trigger

Adjustable high visibility sights
Solid bushing
Enlarged ejection port
Beveled magazine well
Extended thumb safety
Throated barrel and polished feed ramp
Round and polish bottom of extractor hook
Magazine floor plate pads

Trigger over travel stop
Deactivate grip safety
Flat main spring housing
Spring modification to magazine release
Combat accuracy job (slight tightening of slide; solid bushing, not too tight; fitting of barrel hood,
link and slide stop to barrel lugs; 3 to 5 inch groups at 50 yards.
Bobbed hammer
Press fit of firing pin stop

Colored sights
Duck tail grip safety
Ambidextrous thumb safety
Custom stocks
Stainless steel parts
Recoil buffer

Sight rib
Optical sights
Trigger shoe
Extended slide stop
Squared or hooked trigger guard
Loaded chamber indicator
Double action conversion
Muzzle brake
Over-length barrel
Extended magazine release
Recoil spring guide
Long slide
Group gripper
Ejection port modified to drop brass close to shooter
Maximum Accurize job; hard fit, lapped, maximum tightness, groups of 1 3/4 to 2 1/2 at 50 yards.
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LB, I too often wondered about that as well. While most of my 1911's over the years (I honestly don't have a clue how many but I've not been without at least one 1911 since I was 19 and often had a couple or more! I'm 70 now and only have 4, although the Llama Officers Model has been wearing a .22 conversion slide since 1998!) have worked just fine out of the box, I intentionally bought some that were, let's say picky as to what they would eat (and thus cheap!). In most cases all I ever did was polish the feed ramp and try a different mag, which in most cases fixed the problems. A couple (never Colt) needed a bit more work but all did ok eventually. I really don't know what's going on with all the "bad" 1911's out there but it has not been my experience!
I thought that I was the only one with a dedicated LLama lower for a .22 conversion.
Mine is a full size though.
Seems he did not care for Southpaw shooters. Ambi safeties save time, and yer sight picture.
Another "factoid."

Cooper was a reserve LtCol.

Not a Full Colonel.
True enough. He was a "Battleship Marine" serving on the Pennsylvania", during the Korea "dust up" he fired more rounds as a member of a "clandestine" organization (he never would talk much about this even after it was declassified - I'm not sure whether he re-activated his Marine service during that time or not - I guess we could ask Lindy ).

Most folks know, but people use the term "Colonel" as the shortened version of Lt. Col. In fact, people in the military called me a "Colonel" simply because they found out I was a "Ky. Colonel" (don't let that impress you, it is an easy "rank" to get! - though I might be the only one to gain it due to firearms instruction ;) ) - I put the kibosh on that pretty quick - it was way too confusing in a military setting...besides, I'm not much on titles.

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This from a '70s issue of Guns & Ammo magazine.
Photograph White Black Trigger Air gun
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Uncle Jeff said the 1911 should have “sights you can see, a trigger you can manage, and a dehorning job.” Anything else was gun and shooter dependent.
I believe I first read that in the Guns and Ammo "Cooper on Handguns" 1974 special edition with a red cover (before he opened Gunsite in Arizona). I think it was memorable in that it cost around $5 when the regular editions were cheaper.

I may still have it in an old box somewhere.

An unarmed man can only flee from evil, and evil is not overcome by fleeing from it. This book will examine one particular form of weapon: the handgun. The handgun is an interesting artifact, and its mastery is a notable accomplishment. Those who master it achieve a peculiar satisfaction, for they partake in some measure of one of the attributes of the gods: The ability to point the hand and smite at a distance. This idea existed millennia before anyone ever saw a pistol. So, it must be an innate human aspiration, independent of technology. It is obviously the basis of the pleasure we take in pistol craft. As the handgun has no evil of its own, it has no skill of its own; however, in a master’s hands, its efficiency is almost unbelievable. As with all instruments, it is the man, not the tool, that makes the difference. The more subtle the tool, the greater the difference. Skill with a shovel makes less difference than with a violin. The handgun lies somewhere between.

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I think I would choose a grip safety with a so call "memory pad" before I would disable a safety.
Yep. I appreciate the grip safety and also the reason I chose Springfield originally when I bought my first auto pistol 14 years ago, the first XD40's imported from Croatia aka the HS 2000.

Still have that pistol as my bedside gun with a light. 14rds of .40 SD ammo is formidable.
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