Fully Auto 1911

The original post did kind of seem like it was fishing but post #3 explains he's trying to diagnose a problem he has already had with his 1911.
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Bingo - thought it would be an interesting thread and it turns out it is!

The short answer is, A MALFUNCTION.
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Also true. It first malfunctioned when I tried a new 10 Round mag in it. It had never happened to me before so was a little shocking. After my post, I tried my normal mags and ran into the same problem. Contacted the manufacturer and found that it was not uncommon for pistols in my serial number range to exhibit problems to that end so it is now on a plane to the manufacturer for repair. :p
 
Some years ago a guy set up in this area as a gunsmith, letting it be known that he did super 1911 trigger jobs. His pulls were so light that his knife edge sears kept being battered by the half cock notch. His solution was to grind off the half cock notch. After a couple of his guns ran away (fortunately with no damage), he was visited by the state cops and a couple of lawyers and persuaded to consider another line of work. Last I heard he was doing lawn mower repair.
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There's a guy on youtube ("a" guy? Maybe 10,000 such guys) who thinks the overtravel screw is used to adjust hammer/sear engagement for pull weight. :eek:
 
RickB said:
My gun, like a lot of modern 1911s, has a trigger adjustable for overtravel. The adjustment is effected by turning a headless screw in or out. If the screw is not secured in the trigger via Loctite or staking, the screw can move.
If the screw starts migrating out, allowing additional overtravel, there's nothing to prevent the trigger from overtraveling so far that it pushes the sear spring away from the disconnector, and the latter is free to move up and down as the slide cycles, firing until the trigger is released.
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What you describe is impossible -- unless, perhaps, the grip safety is modified as you said yours is.

The M1911 and M1911A1 as designed did not have an overtravel screw. A great many 1911s sold on the commercial market today don't have overtravel screws. I routinely remove the overtravel screw from any trigger I get that has it. Rearward travel of the trigger is stopped by the grip safety tang.

Even if you had enough overtravel to disengage the sear spring from the disconnector, the spring is what pushes the disconnector up to allow firing. If the spring is disengaged, once the retracting slide pushes it down -- what would make it move back up if the trigger is held in the fired position?
 
Just my two cents: If I had a pistol that malfunctioned like you describe, I'd send it back to the manufacturer for repair/inspection. You could take it to a local gunsmith, but why, when most reputable manufacturers will fix issues, gratis?
 
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