40c/9c - any difference in extractor or ejector?

[DHart]

Thinking I will try a Storm Lake conversion barrel from 40 to 9 in one of my M&P40C's.

Brownells website says a change of extractor & ejector is advised to enhance reliability of the conversion.

Elsewhere I have read that the extractor and ejector are THE SAME between the 40c and 9c.

So, which is right? Same? Or Different?

I'm tempted to just buy a complete M&P9C and not fuss with converting, but I have two M&P40C's, so one can easily be a conversion.

If someone has both 40C and 9C who can confirm if there are any differences in extractor and ejector, that would be great to know. Thanks.

 

[Rastoff]

I have a 40c and a 40 full size. I don't honestly know if the ejector is different between the 40 and the 9. I can tell you the extractor is the same.

I can also tell you that I put a factory 9mm barrel in my full size. With a 9mm mag, the gun works perfectly. No failures to extract or eject.

 

[Frankly45]

I found info in the forum that the extractor, ejector and recoil spring are the same. Based on that I bought a KKM 40 to 9 conversion barrel for my 40c. It's been flawless and accurate for 200 rounds of mixed ammo so far. You will need 9mm mags tho.

Shoot safe,
Frank

 

[retired2006]

I can not tell you about your 40 compact, but I recently converted my 40 FS to 9mm using just the Storm Lake conversion barrel, and 9mm mags. Not a single issue, works great !

 

[Bkreutz]

The extractor and ejector are the same part numbers for 9mm, 357 SIG and .40

 

[DHart]

Thanks to all of you who replied.

On another forum a guy who has both a 40C and a 9C told me that the extractors in each of his are different - that the extractor in his 40C has a slightly larger claw.

So... once again, conflicting information. Arghhhh.

Figuring that buying a complete 9c was $250 more than buying a barrel and two magazines, I decided that it would be worth it to me to just get a complete 9c and not spend money to convert one of my 40Cs.

I guess when my 9C arrives I can personally compare it to my recently purchased 40C to try to determine if I can see any difference between the two ejectors and two extractors.

I assume that the breech face on the 9C slide is narrower than the breech face on the 40C slide?

 

[Coastie762]

DHart, the barrel hood of the 9 is smaller in diameter (approx. 030") than the .40. A factory 9mm barrel will fit the .40 slide but not the other way around.

The guy on the other forum was incorrect IRT the difference in extractors. The .40/357 sig/9mm all use the same extractor.

Check out the parts for sale at Speed Shooter Specialties, they sell the same factory extractor for all three calibers.

 

[Bill In Texas]

I've never heard of having to change either the ejector or extractor with a conversion barrel. You will need 9mm mags though.

 

[DHart]

DHart, the barrel hood of the 9 is smaller in diameter (approx. 030") than the .40. A factory 9mm barrel will fit the .40 slide but not the other way around.

The guy on the other forum was incorrect IRT the difference in extractors. The .40/357 sig/9mm all use the same extractor.

Check out the parts for sale at Speed Shooter Specialties, they sell the same factory extractor for all three calibers.

OK... thanks. I've been all over the internet trying to find part numbers for the extractors and ejectors and haven't had any luck. Does S&W list these parts anywhere, or is Speed Shooter Specialties the only place to find these factory parts? Brownells and Midway only sell a narrow selection of M&P pistol parts.

 

[DHart]

Bonkers... thank you. I had a feeling that the breech face much be a little narrower with the 9mm.

And what you say makes sense - the difference in distance between the extractor and the cases, between each caliber, isn't significant enough to cause a problem when using a 9mm conversion barrel in the 40.

And you are right - funny - there is still something in me that makes me want to add a 9mm conversion barrel. But with a complete 9c on the way, I think I will be able to resist the urge to convert the spare 40c to 9mm.

Well, if you can afford a 9 mm then by all means pick one up! Except then you'll realize you STILL want to drop a conversion barrel in your 40! That's just the way it is...

There is very little if any difference between a 9 mm and .40/10 mm extractor. The difference is that the 9 mm has a .03" narrower breech face slot, and the extractor naturally sits about .015" closer to the rim than in the .40. To that in terms of "positive numbers", the .40 breech face slot is a mere .762 mm wider...well, even in mm the difference is so tiny it still registers in decimals. What this means is the .40 rim is not much larger than the 9mm rim. This means the 9 mm rim can only shift about 1/3d of a mm "left" which is well within the margin of tolerance of many guns!

Generally the reason .40 caliber pistols use a special "conversion" barrel to go 9mm is due to differences in the mounting interface. I think you will find the gun will eject just fine with a 9mm barrel.

 

[DHart]

I inquired of S&W Customer Service and was informed that the ejector and the extractor are identical parts between the M&P .40S&W and 9mm models.

The M&P9C that I ordered came in. It has a very nice trigger pull with felt and audible trigger reset. I am not tempted to install an Apex sear, nor an Apex striker block in this pistol - it's great as is.

I think I may order a 40 to 9 conversion barrel for my M&P40, just to make the pistol more versatile. I have 17-round 9mm mags for it already, as I ordered some for my new M&P9C.

 

[Topherthegunguy37]

So if the Extractor, ejector, trigger parts, frame density, and everything in the poly lower half of the gun are same from 9 to 40 then why isnt it possible to take a 9mm and buy a 40 slide and mag to use on the 9mm lower you have?????????

 

[Wireguided Marine]

I bought my 40c in 2012. Added the 357sig barrel about four years later and won a bid on eBay for an OEM 9mm for a low price a year after that. Only thing I needed was 9mm magazines.

Extractor works great, both the original and the apex one I put in last year. I keep a recoil spring assembly paired with the 357; I don’t shoot it often but I know that round is harder on the gun and I want a fresh spring when I use it.

I like having it this way: I have three calibers to use but one gun with the nice sights I like and an Apex trigger and spring kit that’s very broken in and comfortable.

Last year when ammo was hard to get and expensive I had plenty of 40 when Walmart sold all their pistol ammo at the end of 2019. I would have been screwed if I had only a 9mm.

 

[enidpd804]

I've done this with a 5" and an Apex barrel and with a 1.0 40c with a factory 9c. I believe the difference is in the breach face and the placement of the extractor-not the extractor itself. They work *almost* perfectly. They work perfectly with FMJ. With HST +P they both fail to extract at a pace of about 3-5%. So, I use them for practice but not for serious work. YMMV.

 

[much ado]

40 to 9

I posted recently on a similar query my experience...have a Gen 1 40 Compact and bought a S&W 9mm barrel from Midway. It has not failed to feed/extract/eject any rounds 'but' in 40 form throws the brass quite far and in 9mm form ejects them about 4 ft. As "enidpd804" says would not use the 9 barrel in what could be the gravest extreme/so practice only.

 

[RUT]

My M&P .40 works equally well with either the standard barrel or my 9mm conversion same.