Hi
40 to .357 sig all day long because the case head is the SAME size, you can even use the same magazines. No issues yet but in time there may be issues
1SG
Out
Converted my Shield .40 to 9mm
- Thread starter Smitty357
- Start date
Hi
40 to .357 sig all day long because the case head is the SAME size, you can even use the same magazines. No issues yet but in time there may be issues
1SG
Out
robkarrob
Member
Case head, case head. I keep seeing this posted as the basis for all the problems that MIGHT happen with the barrel swap.
40 S&W case head .420
9mm case head .388
difference .032
Since the doom and gloom is the case head and the different sizes MAY affect the extraction of the casing from the chamber and May affect the ejection of the casing. Since the casing dimensions is the diameter, the problems pointed out are the side of the casing picked up by the extractor, and knocked out by the ejector, or half .032 which is .016 inch (1/64 of an inch). Could this cause a problem? Yes if S&W had designed those parts differently for each Shield model, and machined them to extreme close tolerances. But fortunately S&W's design allows the barrel swap from 40 to 9mm. I think it is possible that the extractor and ejector are the same for both the 9mm and 40 Shields. If they are the same, then it would not matter what barrel configuration is used. The following paragraph shows the relationship of those two parts for the full sized: M&P 40 and M&P 9mm.
Anyone wanting to check the S&W online parts list (http://www.smith-wesson.com/wcsstore/SmWesson2/upload/other/PistolPartsList_Retail.pdf), you will find part # 30, ejector, is the same for the full sized M&P 40 and full sized M&P 9mm. This S&W parts list does not list the extractor. But if you check the Apex Tactical parts ( https://apextactical.com/store/product-list.php?pg1-cid11.html ) they show the 40 and 9mm use the same extractor. So it is very likely both Shields use the same parts, and if so, this issue is over.
But again even if they are different parts, which would be very minimally different (1/64 inch case head difference), it does not matter. The Shield 40's, with the 9mm barrels, have been tested by many and found to perform without any problems. So keep on posting that S&W says it won't work, it is dangerous, etc., and we'll keep stating that you're wrong.
Oh by the way the world is coming to an end on December 21. The Mayans can't be wrong, they were among the smartest people on the earth, at the time they developed their calender.
Bob
40 S&W case head .420
9mm case head .388
difference .032
Since the doom and gloom is the case head and the different sizes MAY affect the extraction of the casing from the chamber and May affect the ejection of the casing. Since the casing dimensions is the diameter, the problems pointed out are the side of the casing picked up by the extractor, and knocked out by the ejector, or half .032 which is .016 inch (1/64 of an inch). Could this cause a problem? Yes if S&W had designed those parts differently for each Shield model, and machined them to extreme close tolerances. But fortunately S&W's design allows the barrel swap from 40 to 9mm. I think it is possible that the extractor and ejector are the same for both the 9mm and 40 Shields. If they are the same, then it would not matter what barrel configuration is used. The following paragraph shows the relationship of those two parts for the full sized: M&P 40 and M&P 9mm.
Anyone wanting to check the S&W online parts list (http://www.smith-wesson.com/wcsstore/SmWesson2/upload/other/PistolPartsList_Retail.pdf), you will find part # 30, ejector, is the same for the full sized M&P 40 and full sized M&P 9mm. This S&W parts list does not list the extractor. But if you check the Apex Tactical parts ( https://apextactical.com/store/product-list.php?pg1-cid11.html ) they show the 40 and 9mm use the same extractor. So it is very likely both Shields use the same parts, and if so, this issue is over.
But again even if they are different parts, which would be very minimally different (1/64 inch case head difference), it does not matter. The Shield 40's, with the 9mm barrels, have been tested by many and found to perform without any problems. So keep on posting that S&W says it won't work, it is dangerous, etc., and we'll keep stating that you're wrong.
Oh by the way the world is coming to an end on December 21. The Mayans can't be wrong, they were among the smartest people on the earth, at the time they developed their calender.
Bob
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I am a builder by trade, I would not want a coffee table that i build to be off by .032 let alone a house. For the simple fact that your .032 off thus having a imperfect structure. be it a coffee table house or a dog house.
Oh by the way, the world IS NOT going to end on 12/21/2012. (but sacrasim noted)
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When i first called s&w about the barrels. I was informed that they didnt sell the barrels without the actual pistol (truth be told, they lied). And then they said the 9mm barrel wouldnt swamp into the .40 (truth be told, they lied). IMO, i think they just wanted us to spend more money on another gun (which i already have both the .40 and 9mm Shield), so why the hell would I want to buy another one, lol.
I've been testing this theory months before anyone ever found a barrel for sale on line. At the time I was swapping my 9mm barrel from my 9mm shield into my .40 shield. I never had a single problem with it the whole time. Now after putting my hands on a designated 9mm barrel for my .40 (this allows my ole lady to keep my factory 9mm shield on her at all times now). I've put this 9mm barrel through the paces and once again, there is no problems with it. I believe I stand by a few others who have also done this same conversion, and they will also tell you there has been no problems.
You would think that after all this time, by now one of us should have found a problem.
I've been testing this theory months before anyone ever found a barrel for sale on line. At the time I was swapping my 9mm barrel from my 9mm shield into my .40 shield. I never had a single problem with it the whole time. Now after putting my hands on a designated 9mm barrel for my .40 (this allows my ole lady to keep my factory 9mm shield on her at all times now). I've put this 9mm barrel through the paces and once again, there is no problems with it. I believe I stand by a few others who have also done this same conversion, and they will also tell you there has been no problems.
You would think that after all this time, by now one of us should have found a problem.
robkarrob
Member
MP1SG
You win, your right, and we all all wrong. Now with your experience in construction, you'll not have to worry about your coffee table falling over or your house collapsing because they were built to construction standards of 1/32 inch, I'm sure. Forgot to mention I was a Commercial Construction Manager for 6 years, and for some reason I don't remember holding tolerances to 1/32 inch, but we were probably doing it wrong. Maybe we just got lucky as I don't remember any of our projects falling down, but there again my memory ain't what it used to be.
Bob
You win, your right, and we all all wrong. Now with your experience in construction, you'll not have to worry about your coffee table falling over or your house collapsing because they were built to construction standards of 1/32 inch, I'm sure. Forgot to mention I was a Commercial Construction Manager for 6 years, and for some reason I don't remember holding tolerances to 1/32 inch, but we were probably doing it wrong. Maybe we just got lucky as I don't remember any of our projects falling down, but there again my memory ain't what it used to be.
Bob
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Dikinalaska
Member
I said this a long time ago, if it stopped the issue than we wouldn't be here now. Either that or as usual, nobody listens to me
robkarrob
Member
Dikinalaska
Nice to see someone else understands this. You know the parts are the same for the M&P's. Have you ever tried the barrel swap yourself, and what were the results?
Are you in Alaska? What general area? I'm sure your used to the winter weather. I left Michigan for Florida because of the winters. Michigan is nothing compared to Alaska's winters. I'm sitting here, watching TV and posting on my laptop, doors and windows open, 79 degrees.
Bob
Nice to see someone else understands this. You know the parts are the same for the M&P's. Have you ever tried the barrel swap yourself, and what were the results?
Are you in Alaska? What general area? I'm sure your used to the winter weather. I left Michigan for Florida because of the winters. Michigan is nothing compared to Alaska's winters. I'm sitting here, watching TV and posting on my laptop, doors and windows open, 79 degrees.
Bob
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Bob
I am glad you finally see it my way. This all could have been avoided had you listened to me in the beginning. By the way I am going to send you a bottle of Ginkoba for your memory problem.
1SG
Out
robkarrob
Member
MP1SG
Thanks, I can use it and anything else that might help my diminishing capacities.
Bob
Thanks, I can use it and anything else that might help my diminishing capacities.
Bob
Dikinalaska
Member
No I haven't tried it yet, as I could only get my hands on a shield 9. My cousin has done it, but that's not really proof to anyone else because this is the internet, and anybody can say anything. But he said he hasn't had an issue yet. He's the one that turned me on to being able to swap out barrels. As I gave the shield to my girlfriend for her birthday (see thread Color Crazy) I'll be getting a 9 barrel once I get my .40 for cheaper shooting and practice.
I live on the Kenai Peninsula, where the motto is "A quaint little drinking town, with a serious fishing problem" haha. I work up on the North Slope/Deadhorse, it's where the Ice Road Truckers are driving to. It was -49 with the wind today, so envy wouldn't begin to describe 79 degrees. Only about 130 degrees different lol. I did go to Orlando last month on vacation and am seriously considering moving there though.
bobnieder
Member
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I have used the factory 9mm barrel for my FS M&P .40 (over 600 rounds of accurate fire at both range and NRA classes with no problems or evidence of improper locking). I am buying a Shield .40 and will see Guns & Gear for barrel and mags (btw, although I have been assured they sell the barrels, site searches don't come back with it -- is there a part number I can search on?)
I expect no less stirling performance with the Shield than with its big brother. If the lockup was problematic, wouldn't you expect accuracy problems such as we've been told plague some M&P 9mm pistols? Yet my FS .40 is equal or better in accuracy with the 9mm barrel in place vs. the same pistol firing .40's.
I expect no less stirling performance with the Shield than with its big brother. If the lockup was problematic, wouldn't you expect accuracy problems such as we've been told plague some M&P 9mm pistols? Yet my FS .40 is equal or better in accuracy with the 9mm barrel in place vs. the same pistol firing .40's.
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TheBigC1234
US Veteran
They have them, I got mine for $75 plus shipping. Don't know of any part number or anything, I couldn't find it on their website either.
robkarrob
Member
When I phoned Chris, at Guns and Gear, to ask about the maker of the barrels, he said they had started getting a lot of orders for the barrels. I told him there had been quite a bit of discussion about the barrel swap on this forum. He said he was wondering what had started all the new orders.
So Smitty357, they should be giving you a commission for their increase in Shield 9mm barrel sales. You started it all, back in September, showing your 9 barrel in the 40. Then you recently showed your purchase of the 9mm barrel from Guns and Gear. I ordered right after that post, as that was the first post showing where to buy the barrel.
Now who is going to try the 40 barrel into the Shield 9? It will work, which was easy for me to see when I got my 9mm barrel. It is not a drop in, as you have to remove about .010 from each side of the tang/tab on the barrel. And that's it, just grind a little off both sides of the area around the sight hole, and .010 is very little. Then the barrel should just drop into the 9mm slide. All you need then is the 40 mag, as the 40 cartridges won't fit into the 9mm mags. Too bad as the 9mm cartridges do fit into the 40 mags. I've tried it and it works, fires, and feeds the next round with no problem.
Bob
So Smitty357, they should be giving you a commission for their increase in Shield 9mm barrel sales. You started it all, back in September, showing your 9 barrel in the 40. Then you recently showed your purchase of the 9mm barrel from Guns and Gear. I ordered right after that post, as that was the first post showing where to buy the barrel.
Now who is going to try the 40 barrel into the Shield 9? It will work, which was easy for me to see when I got my 9mm barrel. It is not a drop in, as you have to remove about .010 from each side of the tang/tab on the barrel. And that's it, just grind a little off both sides of the area around the sight hole, and .010 is very little. Then the barrel should just drop into the 9mm slide. All you need then is the 40 mag, as the 40 cartridges won't fit into the 9mm mags. Too bad as the 9mm cartridges do fit into the 40 mags. I've tried it and it works, fires, and feeds the next round with no problem.
Bob
I can't take all the credit for it. I'll just take credit for giving video proof, lol.
As for Guns and Gear, i swear someone else mentioned that in another post somewhere on here. Maybe it wasnt directly stated towards the Shield, but im sure i seen it somewhere. So I called them and asked if they had 9mm barrels and mags. Lucky me, they had some so I went with it from there.
I'll gladly take that sales commission from them though. After all i did show proof it would work, and I did post pics of my new barrel and mag, lol.
Something told me I was starting an epidemic when I posted that original video back in September.
As for Guns and Gear, i swear someone else mentioned that in another post somewhere on here. Maybe it wasnt directly stated towards the Shield, but im sure i seen it somewhere. So I called them and asked if they had 9mm barrels and mags. Lucky me, they had some so I went with it from there.
I'll gladly take that sales commission from them though. After all i did show proof it would work, and I did post pics of my new barrel and mag, lol.
Something told me I was starting an epidemic when I posted that original video back in September.
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Dikinalaska
Member
I think I might try this. Just got a 9 for my girlfriend so I'm heavily debating this. I think I read it somewhere, but wouldn't bet money on it, but is the outside diameter of both barrels the same? If not will the .40 barrel fit through the opening at the front of the slide? It seems like I remember someone posting a picture of a 9 barrel in a .40 frame and there was a larger gap between barrel and slide opening, but it might have been on a compact or FS, I can't remember.
Yes outside diameter of both barrels are exactly the same. My 40 barrel fits perfect in the front of my 9mm frame. The problem is the back of the barrel doesnt fit in the frame (up top near the peep hole). The 40 barrel is a tiny bit to wide for the 9mm slide at that point. Other than that, thats the only physical difference I can visually see..........As far as internally, i have no clue.
Dikinalaska
Member
Ok so if I get a micrometer and shave just enough to fit in the slide at the rear, all should line up as needed? Is there going to be any issue with alignment for feeding or anything else?
Dikinalaska
Member
Edit- I meant fit in frame, not slide in the rear
That is correct, if u shave just enough off the 40 barrel, it should fit in the 9mm slide.
However, as i said above. I have no clue how it will work internally. No clue how it will line up or anything like that. I dont know, simply because I've never fit my 40 barrel in my 9mm frame completly, lol.
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