I recently purchased a Sig M11 a1 in practically new condition.

Cleaned and lubricated it properly, firing factory 124 grain ball. Tried 4 different factory magazines. No limp wrist, experienced Sig shooter, carried one for duty for many years.

When the pistol is fired the empty (fired) casing remains in the chamber and the top most round in the magazine attempts to feed which results in what I would characterize as a textbook double feed. It does this on almost every round fired.

I have visually examined the hook portion of the extractor claw as well as possible and it appears to be intact.

I understand that Sig offers a warranty on their pistols but I’m not excited about shipping it anywhere as I lost a Glock 19 slide several years ago. I was considering ordering a new extractor, springs and roll pin to simply replace the ones in my slide. Does the collective wisdom of this site feel this would have a high degree of solving the problem? I’ve had enough experience with shade tree gunsmiths to not want to trust a local with the pistol. Thanks to all for the feedback and how would you handle this if you didn’t ship the M11 back to Sig?

In addition to the parts you plan to replace, I would add replacing the recoil spring too.

I appreciate the suggestion, Yooper. I considered replacing this but with the pistiol showing essentially no signs of wear I assumed the spring would still have plenty of life left but it's cheap enough to include when ordering parts. If it doesn't cure the problemn then I have a spare for down the road...

To be pedantic, what you describe is a failure to extract. And as you brought up the question of terminology, my own brief discussion:

It’s very common for shooters, like everyone, to change the meanings of words in various ways, such as just calling something like a failure to extract by a different term that originally referred to something else entirely. I can only speculate why that happens, but I suspect it’s often due to lack of basic understanding, plus the tendency to follow the herd. As someone who has been interested in guns for a long time and being concerned about details, I have seen many such examples pertaining to guns and shooting.

The original definition of “feeding” is what the magazine does, not what is happening in your situation. A double feed by the original definition would be if two loaded cartridges were somehow expelled from the magazine at the same time.

Anyway, extraction failures are usually due to problems with the extractor unless the fired case is jammed in the chamber and was very difficult to remove. That could cause an extraction failure, but as you didn’t mention that I’ll assume that’s not what’s going on.

A visual inspection of the extractor might not reveal a problem. In your situation I would replace the extractor with new for starters.

Another possible cause is if the slide does not cycle far enough to allow the fired case to clear the chamber. That could be caused by low-powered ammunition, inadequate slide lubrication, or an excessively-powerful recoil spring. That, however, would not normally result in another cartridge being pushed into position where the bullet is jammed against the base of the fired case. The slide would simply move back a short distance and then forward on the fired case and the next round down would remain in the magazine without being picked up by the slide and pushed into position to be chambered.

Added: The sort of inadequate slide movement I discussed above more commonly results in failures to eject. The slide pulls the fired case back far enough to clear the chamber, but not with enough speed for contact with a fixed ejector to propel it fully out of the gun’s ejection port. The slide then closes on the extracted case leaving what used to sometimes be called “stovepipe” failures. In those failures the slide usually does not move far enough to the rear to pick up the next cartridge that’s being fed from the magazine.

This message has been edited. Last edited by: sigfreund,

Sigfreund - would you think the 2 springs that apply tension to the extractor should be replaced or just the extractor itself?

Considering cost and availability, I would replace the springs even though I doubt it's really needed.

And thanks for not taking me too seriously about the terminology. It’s just one of those little things that annoys me whenever I have to discuss it when running people through the Colorado P.O.S.T. qualification course that also uses it.
Old man grumpiness.

You will need to modify a 3mm punch to get the roll pin out.
Sig used to sell them but I haven't seen one in stock I quite a while.
Basically just take a grinder to a 3mm punch and make it a half moon.

Matrix Precision P226/P229 Half Round Punch to Disassemble Long Extractor Slides

https://www.matrixprecisionpar...-the-long-extractor/